Should be charged for about 15 minutes in the boot, any mobile phone is like this. Today's mobile phone batteries are lithium batteries, this battery is not like the previous nickel battery, so many of the current electronic products that charge more than 12 hours on the manual is wrong, the same excessive discharge on the battery also has great harm, and even can not be charged. The correct way is to charge as much as possible one time full, charging process do not play with the phone, so that the phone and the battery have an impact, full plug, do not overcharge and do not overdischarge. For this situation, do not rush to start, first let the battery silently charge for about 5 minutes and then try to start, the reason has been said, is excessive discharge.