The charging method of valve-regulated sealed lead-acid batteries.

The charging method for valve-regulated sealed lead-acid batteries typically involves constant voltage charging (also known as constant current constant voltage charging). This charging method consists of two stages:

1. Constant current charging stage: During this stage, the charger delivers a constant current to the battery to rapidly charge it. The constant current charging stage maximizes the charging speed and ensures the battery reaches the charged state quickly.

2. Constant voltage charging stage: Once the battery reaches the preset charging voltage, the charger automatically switches to the constant voltage charging mode. In the constant voltage charging stage, the charger maintains a constant voltage output while allowing the current to gradually decrease. This helps reduce the risk of overcharging the battery and ensures that the charging current matches the battery's charging state.

Through this constant current constant voltage charging method, valve-regulated sealed lead-acid batteries can be charged quickly and effectively protected during the charging process, prolonging the battery's lifespan.