How To Store The Battery Pack; On Battery Life - Sony ILCE-7CM2 Help Manual

The battery pack will run down quickly if you use the flash or continuous shooting function frequently, turn the power
on/off frequently, or set the monitor very bright.
We recommend preparing spare battery packs and taking trial shots before taking the actual shots.
If the battery terminal is dirty, you may not be able to turn on the product or the battery pack may not be properly
charged. In that case, clean the battery by lightly wiping off any dust using a soft cloth or a cotton swab.

How to store the battery pack

To maintain the battery pack's function, charge the battery pack and then fully discharge it in the camera at least once a
year before storing it. Store the battery in a cool, dry place after removing it from the camera.

On battery life

The battery life is limited. If you use the same battery repeatedly, or use the same battery for a long period, the
battery capacity decreases gradually. If the available time of the battery is shortened significantly, it is probably time
to replace the battery pack with a new one.
The battery life varies according to how the battery pack is stored and the operating conditions and environment in
which each battery pack is used.
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