究其原因，是由于在以往的蓄电池充电过程中，充电方法不当，易造成蓄电池未充满电或者充电过量，这对蓄电池的使用寿命会有很大的损害。
The reason is that, in the past, during the process of charging the battery, improper methods, easy to cause the battery not fully charged or over charged, which is bad for the battery life span.
究其原因，是由于在以往的蓄电池充电过程中，充电方法不当，易造成蓄电池未充满电或者充电过量，这对蓄电池的使用寿命会有很大的损害。
The reason is that, in the past, during the process of charging the battery, improper methods, easy to cause the battery not fully charged or over charged, which is bad for the battery life span.
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