1.7.4V li-polymer battery 2.2 cells to series ... etc. 7. Do not use inferior charger to recharge this battery in case of damaging the battery.8. ... battery,lithium battery,li-polymer battery,lithium battery pack,ultra-thin battery,shaped battery,triangle shape battery,irregular shape battery,Mp4 battery,Gps battery,tablet PC battery,power tool battery,medical battery,e-bike battery,high-rate battery ...