The seller did not change the battery under warranty, there was no density in the battery when charging 12.9 volts, referring to the incomplete charging of the battery. Although when charging 12.7, the density should be 1.2650, and when the battery is empty, for example, 11 volts, the density should be 1.120. our battery had no density at all, but he insisted on charging the battery for 8 hours, which is not logical.

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