Polymer lithium-ion battery charge expansion is how is it?
Mainly to protect the board of the problem, to prevent overshoot, over discharge, short circuit, over current, pay attention to the general will not bulge, or the battery is damaged the air encountered
Second, the battery discharge or short circuit (of course, this is a protective plate protection, not so prone to such a situation). To prevent such things mainly to use a professional charger, control the charger's voltage and current and charging mode.
First of all lead to the main reason for the drum is charging, because the lithium battery capacity of MP4 will not be great, so the charging current can not be great. General 0.5C charge for the current is too large to easily lead to flatulence, the voltage will be too high.
Lithium battery is badly inflated.
