The charging process of DS2711 is realized according to the behavior of the NiMH battery. NiMH battery is resistant to overcharging, but has high self-discharge rate. After completing fast charge, DS2711 will continue to charge the battery with a lower current, which is the top-off process. After this, it enters the maintenance mode, and will continue to charge the battery until the battery is removed. Therefore, top off process cannot be skipped.