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What is the normal voltage range for a 12V battery?

1 Answers

SanHarrison

07/29/25 6:13pm

For a 12V battery with a terminal voltage of 12V, the normal float charge voltage ranges between 13.5~13.8V. If the float charge voltage is too low, the battery will not be fully charged. Conversely, if the float charge voltage is too high, it will result in overvoltage charging. When the float charge voltage exceeds 14V, it is considered overvoltage charging. Below is relevant information about the voltage range: 1. Excessive discharge causes the terminal voltage of the battery to drop below the allowable end-of-discharge voltage. For a 12V M-type lead-acid battery, the end-of-discharge voltage is approximately 10.5V. 2. In a UPS battery pack, if the terminal voltage difference between individual battery units exceeds about 1V. The initial charging current for the battery is generally set according to the specified value in the manual or at 1/10 of the rated capacity.

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