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Q:Why a battery loses its power when not in use?
A:A batteryloses 1% of its power every 3 to 4 days when not in use. It's normal cause the environment is not fully insulated.

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Frankseo wrote:Q:Why a battery loses its power when not in use?
A:A battery loses 1% of its power every 3 to 4 days when not in use. It's normal cause the environment is not fully insulated.

Well thats a bit of a misnomer. Although you perceive the device to be OFF, its really in a deep sleep monitoring for keypresses or perhaps even clock ALARM. This uses energy, and coupled that batteries will discharge due to internal resistance - they will lose energy even when 'Nothing' appears to be happening.

The battery is Lithium Ion. This is normal.

Lithium ion batteries start to discharge as soon as it is charged.

They also degrade over time. After 2-3 years, it'll have lost its ability to keep its charge.

So always buy a new battery that is at most only 6 months old. A dodge by some cheap battery sellers is to sell on their old batteries that have been lying on a shelf for a year...