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Solution
Charged battery packs continue to discharge naturally. Therefore, charge them on the day of use, or the day before, to ensure a full charge.
Attach the terminal cover whenever a battery pack is not in use. Contact with metallic objects may cause a short circuit and damage the battery pack.
Dirty terminals may cause a poor contact between the battery pack and the camcorder. Wipe the terminals with a soft cloth.
Since storing a charged battery pack for a long time (about 1 year) can shorten its lifecycle or affect performance, we recommend to discharge the battery pack fully and to store it in a dry place at temperatures no higher than 30 deg C (86 deg F). If you do not use the battery pack for long periods, charge and discharge it fully at least once a year. If you have more than one battery pack, perform these precautions at the same time for all battery packs.
Although the battery pack's operating temperature range is from 0 deg C to 40 deg C (32 deg F to 104 deg F), the optimal range is from 10 deg C to 30 deg C (50 deg F to 86 deg F). At cold temperatures, performance will temporarily decline. Warm it in your pocket before use.
Replace the battery pack if the usable time after full charge diminishes substantially at normal temperatures.
Caution
Treat the battery pack with care.
Keep it away from fire (or it might explode).
Do not expose the battery pack to temperature higher than 60 deg C (140 deg F). Do not leave it near a heater or inside a car in hot weather.
Do not try to disassemble or modify it.
Do not drop or knock it.
Do not get it wet.
Caution
About the battery terminal cover
The battery terminal cover has a [ 
Back side of the battery pack
Terminal cover attached
Charged
Uncharged
