li-ion battery 7.4v 2500mah 1.rechargeable lithium ion battery packs 2.Made of 2 pcs 2S1P 3.Within PCM protection li-ion battery 7.4v 2500mah ... Specification: NameLithium Ion BatteryModel Number18650 2500 mAh 7.4VNominal Voltage7 ... up power, cordless tool, power tool, flashlight, torch, barcode scanner, battery etc. Product show :