I guess the first place to start would be to check your Windows power options for battery:
Hopefully not but your battery may actually be bad.
Hi man, i tried to change and set the default mode on energy settings but none of them worked,
so i read something about disable the FAST BOOT on BIOS setup. so i did and think that worked for me...
'm using on energy untill gets charged and than i use the battery to test, no reboots so far but its not the same battery that came with when i bought it, its kinda messy
i let u guys know