Single battery voltage: 3.7V Nominal voltage after the battery pack is assembled: 3.7V Single battery capacity: 400mAh Battery combination: 1 string and 1 parallel Battery voltage range after combination: 3.0V~4.2V Battery capacity after combination: 400mAh Battery pack power: 1.48W Battery pack size: 6*21*43mm Maximum discharge current: <0.4A Instantaneous discharge current: 0.8A~1.2A Maximum charging current: 0.2-0.5C Charge and discharge times: >500 times 3.7V polymer lithium battery: ①Comply with relevant national standards and requirements for batteries ②All finished battery products have been calibrated and tested before leaving the factory. They can be used directly   1. Sufficient capacity: using domestic and foreign brand raw materials, sufficient capacity, low internal resistance, and stable voltage 2. Stable performance: long cycle life, high energy density, wide operating temperature range, stable discharge voltageTelecommunications: walkie-talkie, cordless phone,interphone,ect Power tools: electric drills, screwdriver and electric saw and so on; Power toys: electric auto, electric plans ; Video cassette recorder ; Emergency lightings; Electronic toothbrush; Light Therapy; Vacuum cleaner; Other equipment with high power discharge.1.Long operation life: Cycle life is up to 1000 times in normal conditions; 2.Low self discharge: 80% capacity retention after 1year; Strong emergency adaptability: It can charge quickly in 1~6h in emergency conditions; 3.Wide operation temperature range: It can be operated in the environment of -20~+60 centigrade; 4.Good safety and reliability: Each battery has a safety valve, so it can have high safety and reliability during long-period operation process or in major failures; 5.Pollution-free and no memory effect; 6.Different configuration could be met.