User's Guide

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Precautions >
Using the Battery Pack
Using the Battery Pack
Battery life is shorter in a cold environment. This is due to decreased battery efficiency at low temperatures.
Charge battery packs at temperatures between 50°F to 86°F (10°C to 30°C). Lower temperatures require longer charging
time.
Do not charge the battery pack in any way other than as described in this user guide or as designated by Sony in writing.
While the battery pack is in use or being charged, heat builds up in the battery pack. This is normal and is not cause for
concern.
You do not need to discharge the battery pack before recharging.
If the battery pack quickly runs out of power after being fully charged, it may be reaching the end of its life and should be
replaced.