由于放電越淺，其循環次數將大幅度增加。因此，按這一理論，勤充電對循環壽命是有益的，但就目前市場上大量流通使用的充電器來講，由于受價格因素及技術水平等影響，電池充電器存在故障率高，可靠(kao)性(xing)差，精度低(di)等缺陷。因此(ci)，有時(shi)勤充電(dian)(dian)(dian)(dian)反而影響(xiang)電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的使用壽命。將電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)放(fang)空再充電(dian)(dian)(dian)(dian)，充電(dian)(dian)(dian)(dian)次數(shu)雖然(ran)減少，但放(fang)電(dian)(dian)(dian)(dian)時(shi)由于單(dan)體電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)之間總會存在差異可能(neng)造成某(mou)些單(dan)格過(guo)放(fang)電(dian)(dian)(dian)(dian)，過(guo)放(fang)電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)充電(dian)(dian)(dian)(dian)接受能(neng)力會大(da)大(da)降低(di)，引起(qi)充電(dian)(dian)(dian)(dian)不足的故障，另外由于放(fang)完電(dian)(dian)(dian)(dian)再充電(dian)(dian)(dian)(dian)，充電(dian)(dian)(dian)(dian)器重負荷(he)時(shi)間長，易損壞充電(dian)(dian)(dian)(dian)器。因此(ci)，綜合上述，我(wo)們認為(wei)蓄電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)放(fang)出電(dian)(dian)(dian)(dian)量的 50-70% 時(shi)進行(xing)一次充電(dian)(dian)(dian)(dian)是較合理的，對電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的使用有好處。