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7.2V NiMH Battery

Best 7.2V NiMH Battery Pack 7.2 Volt NI-MH Batterys 5000mah 3000mah Charger

Best 7.2V NiMH Battery Pack and Charger, 7.2 Volt NiMH Battery Pack UK USA, Europe, Germany, 7.2V 5000mah NiMH Battery, 7.2V 3000mah NiMH Battery, 7.2V NiMH Battery 2000mah.7.2V NiMH Battery charger, All 7.2V Robot Battery NiMH 3000mah, 7.2V 1100mah NiMH Battery, 7.2V 650mah NiMH Rechargeable Battery, 7.2V NiMH rechargeable Battery pack and charger, 7.2V 1000mah NiMH Battery.7.2V NiMH Battery Tamiya Connector.

What is the 7.2v NiMH battery pack?

NiMH is an abbreviation for nickel-metal hydride. 7.2V NiMH is a nickel-metal hydride battery, which means that its voltage is 7.2V and the material is NiMH. Its positive electrode is Nio and the negative electrode is metal hydride because it is cheap and very strong and popular. It is widely used in toys such as remote control car toys, remote control tanks, remote control boats, remote control robots, remote control models, low-use electrical machines, etc. on.

Ni-MH batteries are our most common rechargeable batteries in consumer electronics. Due to its superior chemical properties, Ni-MH batteries have replaced Ni-Cd battery applications. Since NiMH does not use cadmium (the use of toxic chemicals in battery applications) and also does not have the same memory problems that plague NiCD, NiMH batteries are a better choice. At the same time, portable high-power solutions are one of the most popular solutions in battery applications. Today, let’s learn about the techniques of using Ni-MH batteries!

A. What are the classifications of Ni-MH batteries?

We usually see nickel-metal hydride battery packs composed of multiple single cells connected in series. Compared with lithium-polymer batteries (LiPO), NiMH batteries are safer to use. The rated voltage of each individual battery is 1.2V, which means that we see that the rated voltage of the Ni-MH battery pack is a multiple of 1.2V. In particular, we provide 1.2 Volt, 2.4 Volt, 3.6 Volt, 4.8 Volt, 6.0Volt, 7.2 Volt, and 8.4 Volt battery packs.

Regardless of the physical size of the battery, the rated voltage of each Ni-MH battery is 1.2V. The physical size of the battery indicates the capacity of the battery. Generally, the larger the battery, the greater the mAh of the battery.

B. Classification and characteristics of Ni-MH batteries:

Ni-MH batteries are divided into high-voltage nickel-hydrogen batteries and low-voltage nickel-hydrogen batteries. 7.2V NiMH batteries are high-voltage lithium batteries.

7.2 Volt high voltage Ni-MH battery has the following characteristics: (1) High reliability. It has better over-discharge and over-charge protection can withstand higher charge-discharge rates and has no dendrite formation. Has good specific characteristics. Its mass-specific capacity is 60A·h/kg, which is 5 times that of cadmium-nickel batteries.
(2) Long cycle life, up to thousands of times.
(3) Compared with nickel-cadmium batteries, it is fully sealed and less maintenance.
(4) Excellent low-temperature performance, the capacity does not change significantly at -10°C.

Low-voltage Ni-MH batteries have the following characteristics:
(1) The battery voltage is 1.2~1.3V, which is equivalent to nickel-cadmium batteries;
(2) High energy density, more than 1.5 times that of cadmium-nickel batteries;
(3) Quick charge and discharge, good low-temperature performance;
(4) It can be sealed and has strong resistance to overcharge and discharge;
(5) No dendrites are formed, which can prevent short circuits in the battery;
(6) Safe and reliable, no pollution to the environment, no memory effect, etc.

C. Maintenance during use

Pay attention to maintenance when using Ni-MH batteries.
(1) Avoid overcharging during use. During the cycle life, avoid overcharging during use. This is because overcharging can easily cause the positive and negative electrodes to swell, causing the active material to fall off, the diaphragm is damaged, the conductive network is damaged, and the ohmic polarization of the battery becomes larger.
(2) Prevent the deterioration of electrolyte. During the cycle life of Ni-MH batteries, hydrogen evolution should be suppressed.
(3) Storage of Ni-MH batteries. The storage of Ni-MH batteries should be fully charged. If the battery is stored for a long time without storing electric energy in the battery, the function of the battery's negative hydrogen storage alloy will be weakened and the battery life will be shortened.

D. Advantages and disadvantages of NiMH battery

1. Advantages: Its advantages are price and hardness. Generally, NiMH batteries are very cheap, much cheaper than lithium batteries, have high hardness, and are relatively strong and not easy to deform. Compared with nickel-cadmium batteries, it has many advantages, such as lighter weight and longer life.

2. Disadvantages: average performance, memory effect, and pollution. However, the performance of NiMH batteries is very general compared to lithium batteries, which can be described as poor. And its lifespan is not very long, each time it needs to be discharged and then recharged, so the mobile phone that wakes up early needs to be fully discharged and then recharged after being bought, while the current lithium battery does not need to be discharged and recharged.

E. NiMH battery charging method

First of all, we need to prepare a special charger for the NiMH battery, because using other chargers will affect its life. Then first discharge the NiMH battery, and then charge it. Each charge takes about 10-20 hours. It cannot be charged for a long time. Overcharge can easily damage the NiMH battery. Normally, the number of recharges for NiMH is 2000 times, after which it will decay.

F. Which is better, NiMH or nicd?

NiMH is better in theory, but the two have their own characteristics. NiMH is called nickel-metal hydride battery, and NiCd is called nickel-cadmium battery. In terms of weight, NiMH is lighter; in terms of life span, NiMH is longer; in terms of performance, NiMH is also stronger; but in terms of price, NiMH is more expensive than NiCd, so you need to consider cost performance when choosing. If it is cheaper, choose the Nicd it is also fine.

How to choose the right 7.2v NiMH battery ?

    Usually the RC battery was used in all kinds of toys, such as RC Cars, remote control aircraft, RC tanks,RC Drone,RC Quadco[pter,RC Hexacopter,RC Robots, etc.

rc battery example 1

1. Choose the right voltage. The battery pack's voltage is the same.

That means, the V number is the same, the volt is the same. Look the picture above, you can see the voltage is 4.8V or 4.8 Volt

2. Choose the right Size.

The shape and size of the battery pack are the same. or you can put the battery inside the toys is ok. ( See The left picture show: the shape is "1 Row with 4X Small AA battery", the battery size is:56X50mm, so your battery must match your battery, then can be put into your toys .)

3. Choose the right connector. The battery pack Connector is the same.

(See The left picture show: it has many Connector, such as Standard Tamiya Connector, small Tamiya connector, SM Connector, JST Connector, Air-to-Air Connector, 2P HuanQi Connector,etc. )

4. Choose the right Discharge coefficient.

For the "NiMH battery, NiCD Battery, lipo battery", it has a Discharge coefficient(It short for "C"), just 15c, 20c, 25C, etc. This Discharge coefficient represents the Battery discharge speed. the larger the C value, the faster the discharge speed.
    So if the Capacity is the same ,the more C value,the more speed or more power for your toys . Meanwhile, the running time will become shorter
Therefore, for the RC Helicopter, RC Drone, Upgraded brushless RC cars, which requires the fast speed or stronger power. You can purchase a discharge coefficient of at least 15C. Also choose 15C, 20C,25C is ok.
Usually, For the RC Helicopter and Drone, the discharge coefficient is at least 15C.
For the Other RC Toys Car, You don't need to care about it. For the Upgrade brushless Car And RC Boat, the discharge coefficient is at least 15C.
For the ordinary toys, RC TOYS CAR, RC toy boat, RC ROBOTS, RC TANK, and remote control robots, you do not need to consider these issues.

If you buy the battery for the Radios, household appliances, we suggest you choose the low Discharge coefficient.like 5C. Or it maybe burns the product.

Generally, If matching the above four conditions, this battery pack can be fit for your toys.

For Example:The left picture show:NiMH AA 3500MAH 4.8V ,So the Volt is 4.8V(Also called 4.8 Volt);the capacity is 3500mah,the Battery material:MINH(Also called NI-MH.);The Battery size is 56X50mm;The Battery shape is :1 Row with 4x AA small Battery.You must have the Same Volt, Same size, same shape. Then you can use this battery.

 

Need to pay attention

1. Battery Capacity(MAH): the "mah" represents the capacity of the battery, it does not affect the use. the larger the mAh, the longer the using time
2. Battery Weight: If the battery's weight is different, usually it does not affect the use of your toys. Because usually the heavier the battery, the bigger the capacity. So usually you do not need to consider these issues. But for the RC Drone, You'd better choose the LIPO Battery, because it has a Lighter weight than NiMH And NICD Battery.
3. Battery shape and size:Different voltage battery packs have different sizes and shapes. So please check carefully for the shape and size, if they are the same or your toys' battery space is big enough, you can buy the same size battery or bigger size battery.

How to choose the right 7.2v NiMH battery charger?

1. Choose a professionally certified charger.

First of all, it must be clear that the charger is a high-loss product, and you must buy the kind of high-quality charger that has passed industry certification, otherwise, it is easy to damage. All chargers in our shop are authentic products that have passed industry safety certification. For all 7.2V NiMH battery chargers, you can buy from our website. This link.

2. It must be clear what material your battery is made of.

You must clearly know whether your battery is a NiMH battery, a NiCd battery, or a lipo battery. For batteries of different materials, different chargers must be selected, otherwise, they cannot be charged.
Especially the NiMH battery charger can only charge the NiMH battery, not other NiCD and lipo batteries. The lithium battery charger can only charge the lithium battery. Please, Remember these.

3. A charger with the same output voltage must be selected.

Such as a 7.2V NiMH charger. Then you will see the output 7.2V at its label. If the voltage is constant, then look at the output current.

4. The charger plug must match your battery all the time, otherwise, it cannot be connected together.

5. Two types of chargers can be selected

A. USB interface charger. Generally, the USB charger can be charged using the charging head of the mobile phone, the USB port of the computer, and the power bank. Convenient for charging when playing outside. Generally, we recommend buying a charger with automatic power-off protection. When the battery is fully charged, the USB charger will automatically power off.
At the same time, for the automatic power-off charger, it has IC charging protection. It can prevent overcharge and overvoltage. When charging, the indicator light will flash. When the battery is fully charged, the indicator light will go out.

B. Socket Charger. This socket charger can directly charge on the socket. The color of the light is red when charging, the light will not go off when it is full, and the color will be slightly darker!

6. Charger charging time

Some people will ask how long the battery pack can be fully charged normally? In fact, the output parameters of the charger are different, the charging time is different, the charger is full of lights will change, the normal charging time is generally about 2-4 hours.

How to charge the 7.2v NiMH rc battery?

A). How to use the 7.2V Ni-MH battery is the best?

Ni-MH batteries may have some defects, mainly because they will discharge by themselves. When the battery is not in use, it will slowly deplete its power, and if the remaining battery time is long enough, the battery may be permanently damaged. A rough estimate of the depletion of NiMH batteries is that 20% of the battery power will be depleted within the first 24 hours after charging, and 10% will be depleted every 30 days thereafter.

B) How to charge the 7.2V Ni-MH battery?

To charge NiMH batteries, we need a specific charger, because using incorrect battery charging methods may render the battery unusable. Note that the time to charge the Ni-MH battery is less than 6 hours, because charging for a long time may damage the battery!

C). How many times is the 7.2V Ni-MH battery charged?

Normally, it is expected that the charge/discharge cycle of a standard Ni-MH battery is 2000 times, but different mileage may vary. This is because every battery is different. The use of the battery can also determine the number of cycles that the battery will survive. All in all, the 2000 cycles (or about) of the battery is quite impressive for a rechargeable battery!

D). Precautions for charging 7.2V Ni-MH battery?

In order to protect the service life of the battery, you should remember several precautions:

Trickle charging is the safest way you can charge the battery. To do this, make sure to charge at the lowest possible rate, the total charging time is less than 5 hours, and remove the battery at this time. This method basically charges the battery at a speed that does not overcharge the battery but keeps it charged.

Do not overcharge the Ni-MH battery. In short, once the battery is fully charged, it stops charging. There are several ways to know when the battery is fully charged. The battery chargers on the market are all "smart" and can help detect small changes in the battery's voltage/temperature, and can indicate a fully charged battery.

F). 7.2V Ni-MH battery storage problem?

Initially, nickel-based batteries and storage had widespread problems. Basically, if the battery is not completely drained before charging, over time, this part of the battery capacity will slowly run out. However, current Ni-MH batteries do not have these problems, but if you do not fully discharge, you can still see the same effect. The newer Ni-MH can be restored by "exercising" the battery (full charge and discharge the battery several times).

G). Can 7.2V NiMH batteries replace alkaline batteries?

This is totally possible! If you are using alkaline batteries, you can pick up some Ni-MH batteries to replace them. The voltage drop experienced by alkaline batteries during use offsets the voltage difference (alkaline 1.5v, NiMH 1.2V).

Every battery is a little different, and the quality of the battery is also different. Before charging for the first time, be sure to check the battery data sheet/product information!

how long to charge 7.2v NiMH battery

Different NiMH capacity of the batteries and different output currents of the Chargers will have different charging times.
So we must know the capacity of the battery and the output current of the charger.
For example, if you have a 7.2V 2000mah NiMH battery and a Charger with the 250mah output current, Theoretically, the charging time is 2000/250*1.2=9.6 hours.
If the charger's output current is 2A, Then the charging time is 2000/2000*1.2=1.2 hours.

how long does it take to charge a 7.2v high power pack NiMH 5000 battery?

First, let’s check the output current on the charger label. At present, the output current of the 7.2V Minh charger is generally 250MAH. The theoretical charging time is: battery capacity 5000MA ÷ charging current 250MA*1.2=24 hours
So the normal charging time is about 24 hours. This is obviously slow,
So we need to buy a Ni-MH fast charger similar to A3, which can be charged in 6 hours. The calculation formula is as follows: The output current is about 2A, 5000mah/2000mah*1.2=6 hours.

How To charge Taranis frisky 2000mah 7.2v NiMH battery?

First, select the NiMH charger with an output voltage of 7.2V Secondly, the plug of the charger should be matched, and the positive and negative poles should be the same. Otherwise, it will short circuit and burn out the charger. Finally, try to choose a higher input current, such as 2A output current, so that it can be charged in 2.4 hours.

12 Tips You should know for the 7.2V NiMH Batttery and Charger.

1. Under normal circumstances, the new Ni-MH battery only contains a small amount of electricity. You must charge it before using it after purchase. However, if the battery leaves the factory for a short time and has sufficient power, it is recommended to use it first and then recharge it.

2. The performance of newly-purchased nickel-metal hydride batteries generally needs 3-4 times of charging and use before they can reach their best performance. Many friends have small problems with the first charging, such as the number of films shot after the first charging. So much. It was solved after 3-4 times of charging and using.

3. Although the memory effect of Ni-MH batteries is small, it is recommended that everyone try to charge them after each use, and charge them all at once. Do not charge them for a while and then use them for a while. This is an important point of "prolonging life."

4. When charging the battery, pay attention to the heat dissipation around the charger. It is not necessary to use a fan to blow it too deliberately, but it should be noted that too many debris should be placed around the charger. Ordinary users often do not have a dedicated storage bag for the battery when using the battery; after replacing the battery, the user will habitually put the battery in hand, regardless of whether the place is clean or humid.
The consequence of this is that the battery is easy to get dirty, the contacts are easy to contact with metals such as keys, etc., and they are easy to get damp. These are the enemies of the battery.
Suggestion: The user should set a dedicated battery placement point and keep the battery clean.
In order to avoid problems such as power loss, keep the contact points at both ends of the battery and the inside of the battery cover clean, and wipe gently with a soft, clean, dry cloth if necessary.

5. When not in use for a long time, remember to take the battery out of the battery compartment and place it in a dry environment. It is recommended to put it in a branded battery box to avoid battery short circuit.

6. Ni-MH batteries that have not been used for a long time will naturally enter a "sleep" state after being stored for a few months, and the battery life will be greatly reduced. If the Ni-MH battery has been stored for a long time, it is recommended that you use a slow charge to charge it first.
Because: According to the test, the best condition for storage of Ni-MH battery is about 80% charged storage. This is because the self-discharge of Ni-MH batteries is relatively large (about 10%-15% a month). If the battery is completely discharged and then stored and not used for a long time, the self-discharge of the battery will cause the battery to over-discharge. It will damage the battery.
Do not believe it? Then think about whether the newly purchased Ni-MH rechargeable batteries still have electricity. This is the reason. Suggestion: Compare more, correct the wrong point of view, and start maintaining the battery in the right direction, otherwise it will be counterproductive.

7. Discharge the Ni-MH. Expert advice. Try not to discharge the Ni-MH battery, over-discharging will cause charging failure, the harm of doing so is far greater than the memory effect of the Ni-MH battery itself!

8. The multimeter self-checks whether the battery is full or not. Generally, the voltage of Ni-MH batteries is below 1.2V before charging, and the normal voltage is around 1.4V after being fully charged. With this judgment, it is easy to judge the state of the battery.

9. The charger is mainly divided into fast charging and slow charging.
The slow charging current is small, usually around 200mA. For example, our common charging current is around 160mA. Her charging time is long, about 16 hours to charge a 1800mAh Ni-MH battery. Although the time is slower, the charging will be sufficient and will not damage the battery.
The fast charging current is usually above 400mA, and the charging time is significantly reduced. It can be done in 3-4 hours, and it has won everyone's love. There are many types of fast charging at different prices. So people often have questions, why are the prices so different for the same fast charge? Good chargers, especially good fast charging, are equipped with anti-overcharging protection function. For example, our common Panasonic premium charger BQ390 performs particularly well in this regard. The excellent chip software design ability is also effective when charging the battery. The damage of fast charging to the battery is minimized.

10. Contradictions: slow charging does not damage the battery but the charging time is too long; fast charging can save time, but it is harmful to the battery. Even the best Panasonic premium charger BQ390 in the world can only reduce the damage. But it cannot be completely avoided.
The way to solve the contradiction is to buy a fast charge and a slow charge. Use fast charging for a period of time.
for example, after 5 or 10 times, switch to slow charging once or twice. In this way, the performance of the battery is restored to the best condition.

11. Batteries are generally used in battery packs, that is, 4 or 6 cells are connected in series.
At this time, it is very important to maintain the balance of each battery, otherwise, the work of the entire battery pack will be affected by the problem of one battery.
First of all, we must ensure that the battery capacity is the same, and it is best to choose batteries of the same brand and model purchased at the same time.
Then, it is necessary to keep the internal power of the battery consistent. Simply put, the battery pack is either full or empty. If there are more batteries to form several battery packs, you can try "selection".
Specifically, battery cells with similar parameters such as capacity and voltage are connected in series to form a battery pack. Due to insufficient conditions.
In general, it is sufficient to measure the voltage after the discharge point and the charged voltage.

12. Finally talk about charging and discharging. High-end NI-MH chargers use -DELTAV to detect battery voltage to determine whether the battery is full. The voltage curve of the battery during charging is a bit similar to that during discharging.
In the beginning, it rises relatively quickly and then rises slowly. When the battery is fully charged, the voltage begins to fall rapidly, but the drop is not very large. The nickel-cadmium batteries commonly used before are similar, but the speed and amplitude of the decline are greater than that of NI-MH. The most popular chargers on the market (the cheaper ones) often use constant voltage charging.
For example, the old GP power bank is 1.4V constant voltage, that is, when the battery reaches 1.4V, there is no voltage difference, and the charging is over.
The result of this is that the battery cannot be fully charged, especially some older batteries, due to the increased internal resistance, the voltage actually applied to the battery is lower.
Moreover, the current of such a charger is often small, and charging often takes more than 10 hours. And the charger with -DELTAV automatically cut off, because it can accurately control the charging time, so it can be more reliable to use high current charging.
High-current charging does not harm the nickel-metal hydride battery as everyone imagined.
On the contrary, the current use of DC requires high-current charging.
The first is the question of time, so I don't need to talk about it.
Then, the Ni-MH battery has a characteristic, that is, the greater the current you charge, the greater the current it can discharge. Now DC is an electric tiger, the current is not small, so relatively speaking, the use of relatively large Current charging is a wise choice to keep the battery clean.
Generally, the charging current of No. 5 can not exceed 1.5C, and C is the battery capacity, which is a 1000MAH battery, and should not exceed 1.5A. I generally use 0.5C for charging (my charger can adjust the current). In terms of discharge, under normal circumstances, DC can be charged after the black screen is black, and the NI-MH memory effect is very small. However, after a period of use, and when the battery is to be balanced and activated, the terminal voltage of battery discharge must be controlled. The final voltage of the NI-MH battery is 0.9V. Be careful not to over-discharge when discharging. Discharge can be stopped when each battery reaches 0.9V. NI-MH batteries are not as powerful as nickel-cadmium batteries and are more sensitive to overcharge, over-discharge, and high temperature. Charge and discharge temperature.
Generally speaking, do not let the temperature of the battery exceed 45 degrees. When the battery is fully charged, the battery will heat up, and the temperature should be around 42 degrees when fully charged with high current, not more than 45 degrees, otherwise, the life will be quickly reduced and the internal resistance of the battery will increase. In addition, the temperature of the battery is relatively high after charging, and it can be charged after it has cooled down, and the battery must be cooled when charging money. To re-use after a long period of non-use, it is best to charge and discharge several times to reactivate the battery.
In normal use, pay attention to keeping the packaging intact and not damaged to avoid short circuits. Don't hit the battery, don't burn it, etc.

How to upgrade your 7.2 volt NiMH battery?

First of all, you need to Consider about the use of the battery.

If the battery cup is used in remote control toys, remote control cars, remote control tanks, remote control boats, robots, water bomb guns, etc., you can select 15C discharge coefficient. You can also choose higher-end, such as lithium batteries. The discharge coefficient is higher.

If used in household appliances, radios, tape recorders, refrigerators, etc., ordinary AA batteries 5C are sufficient.

Can I use the 7.2v 5000mah NiMH battery on our car?<

The first thing to pay attention to is the battery voltage.

Usually, The Battery voltage of the RC Model cars are 7.2V,7.4V,11.V. When your remote control car belongs to one of the above 3 voltages, then 7.2V can be used and it will not burn out your car.

For some toy cars, the original battery voltage is 4V 6V, if you use 7.2V NiMH Battery, the driving speed of the remote control car will definitely become faster, but the circuit board may be burned out.
So in order to ensure 100% usability, you'd better check the voltage of the original battery yourself. If the original battery voltage matches 7.2V or is higher than 7.2V, then you can rest assured to use 7.2V NiMH battery without worrying about damaging or burning the circuit board of the remote control car. Conversely, if the original battery voltage is lower than 7.2V, you need to carefully consider using it.

Another problem is the size of the battery.

You need to consider whether the battery size can fit in, or whether there is a way to fix it on the remote control car. As long as it can be fixed on the remote control car, or can be put in the remote control car battery box, then this type of upgrade battery can be used.

Buy a 7.2V NiMH Charger

If all the above are met and can be used, you'd better buy a 7.2V NiMH charger to charge it. Because other types of chargers cannot be charged

Where to buy the 7.2v 2000mah battery on our car?

You can buy it in our store : RCHobbies.org , or in stores such as Amazon or eBay.

On our online shop here ,we can ship to All over the world ,you can pay it .
we pay by the paypal or credit .Do you have it?
how to pay you can see this page
http://rchobbies.org/infor.aspx?id=8
thanks again for you trust and support for our website: rchobbies.org
we can ship all over the world by the post office,EMS,etc ,and the price on our webiste is the price which ship all over the world .

7.2V NiMH Batteries FAQ

People also ask

How long do you charge a 7.2 NiMH battery?

Different NiMH capacity of the batteries and different output currents of the Chargers will have different charging times.
So we must know the capacity of the battery and the output current of the charger.
For example, if you have a 7.2V 2000mah NiMH battery and a Charger with the 250mah output current, Theoretically, the charging time is 2000/250*1.2=9.6 hours.
If the charger's output current is 2A, Then the charging time is 2000/2000*1.2=1.2 hours.

Can I use a 7.4 V battery instead of 7.2 V?

If used for remote control cars, remote control models, etc., it is generally possible. Because the voltage is not much different, the damage to the toy is generally not too great.
If it is used on more expensive items, it is recommended not to use it.
The last thing to pay attention to. NiMH battery does not have 7.4V. Generally, 7.4V batteries are lithium batteries, such as 18650 batteries. When they are charging, they need a special charger for lithium batteries to be used. The NiMH charger can only charge the NiMH battery. Remember.

Can I charge a 7.2 V battery with a 9.6 V charger?

Hello, the 9.6V charger cannot charge 7.2V, it will burn the battery. Or you can check the label of the charger carefully and see the output voltage on it. If the output voltage is 7.2V, it will do.

Can you charge a 7.2 V battery with a 12v charger?

Hello, the 12V charger cannot charge 7.2V, it will burn the battery. Or you can check the label of the charger carefully and see the output voltage on it. If the output voltage is 7.2V, it will do.

Should I discharge my NiMH battery?

Ni-MH batteries do not need to be fully discharged and then recharged, and excessive discharge should be avoided. When discharged below 1V~0.9V, it may cause permanent damage to the battery, reduce the capacity, and even cannot be recharged. The tolerance of Ni-MH batteries to over-discharge is much lower than that of Ni-Cd batteries. NiMH batteries (NiMH) are improved from NiCd batteries, replacing cadmium (Cd) with metals that can absorb hydrogen.

What voltage should I charge a 7.2 V battery?

When you buy a charger, please check its label carefully. If the label indicates that the output voltage is 7.2V, it is fine. Don't try other chargers.

Can you overcharge a NiMH battery?

Hello, the chargers currently on the market generally have protective plates. When it is fully charged, it will prompt or automatically power off for protection. So when we find that it is full, or it has been charged for 24 hours, do not charge it again. It is best to unplug it. Especially don't keep charging at night.
But if the charger voltage is too high, the battery will be damaged. Although the outer shell of the Ni-MH battery is iron shell, there are small holes to prevent explosion. If the battery is found to be very hot and the battery fluid leaks from the small hole, the charging will have to be stopped. It won't explode once it runs out.

Do NiMH batteries explode?

Hello, the chargers currently on the market generally have protective plates. When it is fully charged, it will prompt or automatically power off for protection. So when we find that it is full, or it has been charged for 2-5 hours, do not charge it again. It is best to unplug it. Especially don't keep charging at night. But if the charger voltage is too high, the battery will be damaged. Although the outer shell of the Ni-MH battery is iron shell, there are small holes to prevent explosion. If the battery is found to be very hot and the battery fluid leaks from the small hole, the charging will have to be stopped. It won't explode once it runs out.

What is the best charge rate for NiMH batteries?

If you want to add the efficiency rate of the charger, then you cannot answer. The conversion efficiency rate of each type of charger is different. If you calculate the charging efficiency of a certain battery, you generally ignore the charger and only calculate the charge. Charge the battery power during the process.
And the charging efficiency of the battery is related to the charging method of the charger, and it mainly includes: constant current type, constant voltage type and pulse.
I don’t know the charging efficiency of Ni-MH, I only know that the lithium battery is charged by pulse mode to over 90%

How do I know if my 7.2V NiMH battery is bad or not?

1 If the battery is recharged many times and it is still out of power, it may be damaged.

2 The multimeter checks whether the battery is full or not. Generally, the voltage of 7.2V Ni-MH battery before charging is 1.2*6=7.2V or less, and the normal voltage is about 1.4V*6=8.4V after being fully charged. With this judgment, it is easy to judge the state of the battery.

3 Ni-MH batteries that have not been used for a long time will naturally enter a "sleep" state after being stored for a few months, and the battery life will be greatly reduced. If the Ni-MH battery has been stored for a long time, it is recommended that you use a slow charge to charge it first. 、Because: According to the test, the best condition for storage of Ni-MH battery is about 80% charged storage. This is because the self-discharge of NiMH batteries is relatively large.

4 When not in use for a long time, remember to remove the battery from the battery compartment and place it in a dry environment. It is recommended to put it in a branded battery box to avoid battery short circuit.

How do you charge a NiMH battery without a charger?

Generally, this situation is more difficult, if you must use it. You can consider choosing two AA 18650 3.7V lithium batteries, which will be 7.4V in series, and then find two iron wires, one connected to the positive electrode and the other to the negative electrode, you can charge the NiMH battery. The charging time needs to be judged by yourself, such as 1 hour, 2 hours. Wait 4 hours.

What is the voltage of a fully charged 7.2V NiMH battery?

Ni-MH charging saturation voltage is around 1.5 to 1.6V, and most of the discharge power is concentrated around 1.2v. So the nominal 1.2v. 7.2v Ni-MH battery is connected in series for 6s, and the voltage of a fully charged 7.2v Ni-MH battery is 9V However after the load is connected, it quickly drops to the nominal voltage of about 7.2v, and when the discharge is almost completed, it is about 0.5v. (6 times 0.9v, retaining a certain safety factor).

when should i charge a 7.2v NiMH battery

When you feel that the remote control car can't be controlled, you should quickly charge it.

what voltage to charge 7.2v NiMH battery

When the Ni-MH discharge is almost completed, it is about 0.5V. So charge it in time near 0.5V.

what lipo battery to replace 7.2v NiMH

The voltage and capacity of the lithium battery are almost the same without any problems. You can use a 2S 7.4V lithium battery instead, which is faster. Stronger motivation. But the lithium battery must be protected by a protective board during the charging and discharging process, otherwise it will be overcharged and overdischarged, and the battery will be scrapped.

how long would a first charge take on a 6 cell 7.2v NiMH battery

Different NiMH capacity of the batteries and different output currents of the Chargers will have different charging times.
So we must know the capacity of the battery and the output current of the charger.
For example, if you have a 7.2V 2000mah NiMH battery and a Charger with the 250mah output current, Theoretically, the charging time is 2000/250*1.2=9.6 hours. If the charger's output current is 2A, Then the charging time is 2000/2000*1.2=1.2 hours.

How To charge a venom 7.2v 5000mah NiMH battery

First, let’s check the output current on the charger label. At present, the output current of the 7.2V Mimh charger is generally 250MAH. The theoretical charging time is: battery capacity 5000MA ÷ charging current 250MA*1.2=24 hours.

So the normal charging time is about 24 hours. This is obviously slow,

So we need to buy a Ni-MH fast charger similar to A3, which can be charged in 6 hours. The calculation formula is as follows: The output current is about 2A, 5000mah/2000mah*1.2=6 hours.

How To charge a frsky 2000mah 7.2v NiMH battery

Choose the NiMH charger with the same plug and the same output voltage of 7.2V to charge. Charging time (in hours) = battery capacity divided by charger output current * 1.2. For example, if the 7.2V 2000mnah NiMH battery and the charger output current is 250mah, then theoretically the charging time is 2000/250*1.2=9.6 hours. If the charger output current is 2A. In theory, the charging time is 2000/2000*1.2=1.2 hours.

what should be the chargeparameters to charge a 7.2v 3.6a NiMH battery?

First consider the output voltage of the charger as 7.2V, and second consider the output current of the charger. The greater the output current, the shorter the charging time.

racers edge 5000 NiMH 7.2v battery How To charge

First, let’s check the output current on the charger label. At present, the output current of the 7.2V Mimh charger is generally 250MAH. The theoretical charging time is: battery capacity 5000MA ÷ charging current 250MA*1.2=24 hours
So the normal charging time is about 24 hours. This is obviously slow,
So we need to buy a Ni-MH fast charger similar to A3, which can be charged in 6 hours. The calculation formula is as follows: The output current is about 2A, 5000mah/2000mah*1.2=6 hours.

how long does it take to charge a dynamite 7.2v 1750mah NiMH battery: mini-t battery

Different NiMH capacity of the batteries and different output currents of the Chargers will have different charging times.
So we must know the capacity of the battery and the output current of the charger.

For example, if you have a 7.2V 1750mah NiMH battery and a Charger with the 250mah output current, Theoretically, the charging time is 1750/250*1.2=8.4 hours. If the charger's output current is 2A, Then the charging time is 1750 /2000*1.2=1.05 hours.

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