When you leave your batteries untouched for a while you may expect them to retain their charge and be ready for action whenever you need them. However, that's not always the case. This phenomenon called self-discharge can catch people by surprise. It's similar to the release of air slowly from a balloon, invisible to the eye but inevitable.
Self-Discharge is Inevitable in All Batteries: Self-discharge is a natural phenomenon where batteries lose their charge over time even when not in use. This occurs due to internal chemical reactions within the battery, and the rate of self-discharge varies depending on the battery type and environmental conditions.
It’s important to understand why your battery might not be fully charged when needed, its reliability, and the overall battery life. Self-Discharge is Inevitable in All Batteries: Self-discharge is a natural phenomenon where batteries lose their charge over time even when not in use.
The worst situation is keeping a fully charged battery at elevated temperatures. Battery packs do not die suddenly, but the runtime gradually shortens as the capacity fades. Lower charge voltages prolong battery life and electric vehicles and satellites take advantage of this.
A good battery absorbs most of the charge in Stage 1 before reaching 4.20V/cell and the trailing in Stage 2 is short. “Lack of hunger” on a Li-ion can be attributed to a battery being partially charged; exceptionally long trailing times relates to a battery with low capacity, high internal resistance and/or elevated self-discharge.
Batteries degrade over time, even with the best of care, and if a battery is no longer properly holding a charge, it should be recycled and replaced. Readers like you help support How-To Geek. When you make a purchase using links on our site, we may earn an affiliate commission.
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