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What does AH mean for car batteries?

1 Answers

SanHenry

07/28/25 3:58pm

AH is a unit representing battery capacity, specifically the capacity of the battery. Below is relevant information about battery capacity: 1. Battery capacity is generally measured in AH (Ampere-hours), while another measurement is in CELL (unit plates) watts (W) (W/CELL). The AH (Ampere-hour) calculation is based on discharge current (constant current) I × discharge time (hours) T. For example, a 7AH battery can last for 20 hours if discharged continuously at 0.35A. 2. Battery capacity refers to the amount of electrical charge a battery can store. The unit of battery capacity is "mAh," commonly expressed as "Ah" in Chinese, known as Ampere-hours (1Ah=1000mAh). If a battery has a rated capacity of 1300mAh, it means the battery can operate continuously for 10 hours at a discharge current of 130mA. 3. When charging or installing the battery, it is crucial to ensure the installation is secure. Batteries are highly susceptible to damage from vibration. During transportation, dropping, rolling, or heavy pressure on the battery is strictly prohibited.

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