[Q]3.0 EMUI battery issues: topic

Hello everyone. I am new rom 3.0 and I really like EMUI 3.0 . But there is one problem here: my phone when battery low alarm, it quickly dropped to 0% and power off after a few seconds. I only have a problem when using EMUI 3.0 b709 B708 - problems previously with 2.0 rom not available, the device indicates a low battery after charging plug is operating normally. So how can I solve this problem?
Sorry I did not know English - I use google translate.