ITEM NAME:5pcs 2S 3A Li-ion Lithium Battery 7.4v 8.4V 18650 Charger Protection Board B4C1 5pcs 2S 3A Li-ion Lithium Battery 7.4v 8.4V 18650 Charger Protection Board B4C1 high-accuracy voltage detection circuit; terminal of the charger using high voltage device; Built-in three-stage over-current detection circuit (over-current 1, over-current 2, or load short circuit); MOS transistor can control the battery charge and discharge; low standby current consumption. Material:plastic ABS Color:blue Over charge voltage:4.25-4.35v+/-0.05v Over dishcarge voltage: 2.3-3.0v+/-0.05v Max continuous current:3A Max peak current:5A Working temperature:-40---+50 Storage Temperature:-40-- +80 Small current:less than 3uA Life cycle :more than 50000hours Resistance:Less than 45m Short cut protection :Protectable Size: 36*6*1.0mm Package: 5pcs x 2S 3A Li-ion Lithium Battery Charger Protection Board Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Resistance:Less than 45m. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Short cut protection :Protectable. Working temperature:-40---+50.