Introduction:This is brand new 2600mAh 18650 li-ion battery from japan Sanyo. This is a High capacity 18650 with low internal resistance. This is probably the best 18650 battery up on market. An ideal power source especially for high power laser pointer and led flashlight or other electronic product.Specification: Product name:Sanyo 18650 2600mAh battery Brand: Sanyo(Original and brand new) Internal resistance:66 Protective Internal resistance:40 Voltage:3.82v Charge Voltage : 4.20+/-0.03V Discharge Cut off Voltage: 3.0V The maximum current:5.5 A Size: 69mm x 18MM (lenght x diameter)Features: Double MOS protective circuit Designed for led flashlight battery. Comes with protectived sheet steel,Solid and durable. Blue head Sanyo 18650 2600mAh battery is one of the best in 18650 battery.Note: Do not make the battery resting for a longtime.Please charge for the battery at least every 6 months.Package included: 1 x Sanyo 18650 2600mAh batteryDispatched Withing 24 Hours.