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WARNING
Safety
precautions for Lithium Polymer and NiCd cells/packs
1. Never
fast-charge any battery type unattended.
2. Never charge LiPo cells/packs at any rate unattended.
3. Only charge LiPo cells/packs with a charger designed
specifically for lithium polymer chemistry.
4. LiPo cells can ignite because of unmatched cell capacity or
voltage, cell damage, charger failure, incorrect charger settings
and other factors.
5. Always use the correct charging voltage. LiPo cells/packs may
ignite if connected to a charger supplying more than 6 volts per
cell.
6. Always assure the charger is working properly.
7. Always charge LiPo cells/packs where no harm can result, no
matter what happens.
8. Never charge a cell/pack in a model. A hot pack may ignite
wood, foam or plastic.
9. Never charge a cell/pack inside a motor vehicle, or in a
vehicle’s engine compartment.
10. Never charge a cell/pack on a wooden workbench, or on any
flammable material.
11. If a cell/pack is involved in a crash:
a. Remove
the cell/pack from the model.
b. Carefully inspect the cell/pack for shorts in the wiring or
connections. If in doubt, cut all wires from the cell/pack.
c. Disassemble the pack.
d. Inspect cells for dents, cracks and splits. Dispose of
damaged cells (see below).
12. Dispose
of cells/packs as follows:
a.
Discharge: with the cell/pack in a safe area, connect a moderate
resistance across the terminals until the cell/pack is
discharged. CAUTION: cell/pack may be hot!
b. Discard:
- NiMH:
place in regular trash.
- NiCd: recycle (cadmium is toxic).
- LiPo: puncture plastic envelope, immerse in salt water for
several hours, place in regular trash.
13. Handle
all cells/packs with care, as they can deliver high currents if
shorted. Shorting by a ring, for example, will remove a finger.
14. Always store cells/packs in a secure location where they
cannot be shorted or handled by children.
15. When constructing a pack, use only cells of the same capacity
(mAh). During continued use of a pack, periodically check
individual cells after discharge and before charging to verify
cell voltages are within 0.1V of each other. If a pack has become
unbalanced (i.e., cell voltages are more than 0.1V apart), restore
balance by charging the cells individually to 4.2V before
reconnecting as a pack.
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