battery capacity and charging speed

Battery capacity refers to the amount of energy a battery can store, usually measured in milliampere-hours (mAh) or watt-hours (Wh). It indicates how long the battery can power a device before needing to be recharged. Charging speed refers to the rate at which a battery can be replenished with energy during the charging process. It is usually measured in terms of the charging current (amperes) or charging power (watts), indicating how quickly the battery can regain its capacity.

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