1.3.7v 9mAh lipo battery 2. L55*W22*0.45mm 3.CE & RoHS 4.environmental and safe 5. ... in a pocket or purse with metal objects like coins,paper clips etc. 7. Do not use inferior charger ... battery,triangle shape battery,irregular shape battery,Mp4 battery,Gps battery,tablet PC battery,power tool battery,medical ... some other products utra-thin li-polymer battery 3.7V with the size 0.45*22*55mm on sale