Как производители проверяют время автономной работы?

Срок службы свинцово-кислотных аккумуляторов проверяется различными методами в зависимости от их применения.. Если батарея предназначена для обеспечения низкой емкости, например, троллинговый двигатель или машина для гольфа, батарея подвергается непрерывным циклам, которые подсчитываются до тех пор, пока емкость не упадет ниже допустимого уровня. Это по сравнению с рейтингом.

There are many types of tests for the life testing of automotive batteries. It would be too expensive to continuously test starting batteries at hundreds of amps, so most tests perform short discharges and charges at a current that is typical of the background discharge level of a vehicle followed by periodic discharges at high rates until a failure voltage is observed. Generally the tests are accelerated by increasing the temperature and charging voltage, but they can still take a long time. The amount of life cycles the battery achieves is compared to a rating for the battery.

There are also accelerated life tests for standby batteries that generally put the batteries on a higher float voltage charge at a high temperature until the battery fails to deliver satisfactory capacity determined by periodic discharges.

Accelerated life tests rarely mimic actual usage, and the failure modes during life testing often do not match that of actual field use. The correlation to actual field tests is usually low. Often the life of a battery is deteriorated during stand periods when not in use rather than actual charging and discharging operations that life tests focus on.