charge

　　4.Don’t charge your phone unless it’s almost dead

　　在电量几乎耗尽之前不要充电

　　This, too, is a popular myth about lithium-ion batteries. It’s not harmful to plug your phone in before the battery is drained — in fact, it may be better for your battery. Batteries have a limited number of charge cycles before they lose their ability to hold a charge. A charge cycle consists of charging your battery back up to its full capacity when it’s out of juice. The reason your phone’s battery life diminishes as it gets older is because it’s already used up many of its cycles, not because you’re plugging it in when the battery is already half full.

　　这也是一种关于锂电池的普遍误解。在电量耗尽之前就插上充电器其实并没有什么害处——事实上，这可能对你的电池更好。 在电池的电量完全流失之前，电池有一定额度的。循环充电包括了当它没电的时候，把你电池再次充满。随着时间的流逝，你手机电池的寿命变短了，是因为用过多的循环充电，而不是因为你在电池还剩一半电的时候就充上了。