Aspire ICR 18650 2600mAh Li-ion Battery, is the high performance rechargeable lithium battery, made for high discharge current (max.40A) applications, more than enough to run any high drain (high discharge current) device. It provides much longer run time than any standard ICR battery.   Parameters Size: 18650 (18mm diameter x 65mm long) Type: Li-ion INR (Rechargeable) Rated Capacity: 2600mAh Max Discharge Current (Continuous): 20A Max Discharge Current (Pulse): 40A Voltage: 3.7V Protected: No Style: Flat Top Rated storage temperature: 20-60 C