The nominal handset lithium battery voltage is 3.6 V, filled voltage is 4.2 V, actually standard rate discharge (0.2 C, C is the lithium battery capacity of lithium battery) is usually in the platform of discharge in lithium batteries, 3.7 V bag actually include a protection board, protection board’s main function is to prevent the lithium battery charge and short circuit, so although marked the battery can use metal objects circuit batteries are negative, but you also have no relation, short circuit protection board will cut off discharge loop movement.

Because the chemical properties of lithium battery, if put the battery may be damaged after protecting circuit design, so need to avoid overdischarge, general design of the voltage protection 2.4-2.6 V, but in the use of mobile phones and mobile power management, internal would have detected in mobile phone circuit, the battery can show out fast, the voltage power is not enough, the battery is not to put off automatically. Lithium battery charging pressure setting in general, because this 4.35 V charging pressure value, if the largest IC shipments to 435 V battery voltage filling is a bit too, the best is 4.25 V will stop charging protection circuit design, I was also 435 V, I think probably because of the reason of IC shipments, because most of the parameters of the manufacturer chooses the IC, so in order to facilitate, I chose this paragraph.

Lithium battery charging process is as follows: firstly, if exceed voltage test voltage 2V, namely that battery performance is normal, began to recharge, charging standards of constant flow rate is 0.2 C, namely the battery will 860mAH 200mA close to the current charge, until, turn to 4.2 V battery, namely constant pressure constant voltage, current 4.2 V recharge current smaller and smaller, until in less than 0.01 C, namely, charging 10mA, full instructions for the battery can stop, also can continue to charge, but no longer increases the power of the battery, actually E398 rate is 0.4 C, plus the fact that each battery nor venting and nearly 30% of the electricity, so when the time is usually charged three hours or so may be filled.