ITEM NAME:2S 8A 7.4V w/ Balance 18650 Li-ion lithium battery BMS charger protection boar3C Description: Model: HX-2S-D01 Overcharge voltage range: 4.25-4.35v ±0.05v Size: Show in the picture Over-discharge voltage range: 2.5-3.0v ±0.05v Upper limit working current: 8A Working temperature: -40---+50  °C Upper limit instantaneous current: 10A Storage.Upper limit working current: 8A. Internal resistance: less than 300mÃŽ ©. Effective life: more than 50,000 hours. Size: Show in the picture.