MobilePhoneBatteryBL-4SforNokiaSpecificationModelBL-4SCellTypeli-ionStandardVoltage3.7VChargingLimited4.2VCapacityRange500-600MAhColorblackQualityGradeA/AA/AAACycleTimemorethan500timesGuarantee12monthsMOQ500PCS/OrderCompatibleModels3600STips1)Useanorginalorreliablecharger 2)Donotthrowthebatteryintofireorwater 3)Toavoidkeepingitatthetemperatureabove45degreesoritmaycauseexplosion 4)Donotpressingitordroppingitfromthehighaltitude. 5)Topreventshortcircuit,nevertoputittogetherwithconductorssuchaskeysandcoins,etc.. 6)Keepthebatteryinacooldrysurrowndingifitsstandby The injection process The double IC PCB Reflow reinforcement Double IC Nickel plate Battery Testing Assemble Battery Packing and Sealing