Chongqing Yuntu Automobile Trading Co., Ltd.

Chongqing Yuntu Automobile Trading Co., Ltd.

Why perform deep discharges on Electric Car periodically?

2026 03/30

MG Electric Car batteries undergo sulfation after discharge, with noticeable sulfation appearing as early as 12 hours after discharge.
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However, periodically performing deep discharges can help "activate" the battery, slightly increasing its capacity.
The general method is to periodically perform a complete discharge. A complete discharge is achieved by riding the vehicle under normal load conditions on a flat road until the first undervoltage protection is triggered.
Note that we emphasize the first undervoltage protection. After the first undervoltage protection, the MG Electric Car battery voltage will rise again after a period of time, returning to a non-undervoltage state. 
Using the battery again at this point can severely damage it.After a complete discharge, a full charge will result in a noticeable increase in battery capacity.