Samsung 26F 18650 Li-Ion Flat Top Battery3.7V, 2600mAhFeaturing a potent yet stable chemistry, the Samsung 26F 18650 Lithium Ion Flat Top Battery is the ideal power source for a number of high-performance devices. This impressive cell uses a sophisticated Lithium Cobalt Oxide (LiCoO2) chemistry, which not only allows it to deliver 3.7 Volts of power but gives it a sizable 2600 mAh capacity - enough to power your device through extended use. The battery's flat-top terminals function well in high-performance flashlights and are ideal for use in battery packs.Specifications: Battery Size: 18650 Battery Chemistry: ICR (LiCoO2) Terminal Type: Flat Top Nominal Voltage: 3.7V Nominal Capacity: 2600 mAh Max Charging Current: 2.6A Recommended Charging Current: 1.3A Estimated Charge Cycles: 500 cycles Max Discharge Current: 5.2A Operating Temperature Range: -4°F to 140°F (-20°C to 60°C) Shelf Life: 10 Years Dimensions: Length - 2.56" (65 mm) Diameter - 0.72" (18.4 mm) Weight: 1.66 oz. (47 g)