Model no: IP4S , 3in1battery kit include the battery+tool Internal battery Brand New, this model is not compatible with Iphone 4 , please read the description carefully, don’t by wrong battery model3in1battery kit include the battery+tool Internal battery Brand New Voltage: 3.7V Capacity:1430mAh Weight:50g, we used 1500mah battery core, high capacity battery , steady voltage , long time standby , good QC control.