1.size:AA 2.voltage:1.2V 3.capacity:600mAh 4.certificate:CE,ROHS,MSDS,ISO9001,etc ... temperature from -20 degree to 55 degrees.8 Applied to cordless phones,walkmans,solar lighting,electrical drills,shavers ,emergency lighting and ... back-up power,etc. Ni-MH 1.2v AA600mAh rechargeable battery cell