Olight 186C35 Customized 18650 3500mAh Rechargeable Battery. Unlock the Full Potential of Your LED Light This specially-designed Olight 18650 battery allows you to utilize the magnetic charging capability of lights such as the Olight S30R III. While the flashlight will run on other 18650s, this custom cell is necessary to enable the internally-recharging magnetic docks and cables. Built for Demanding Usage Olight designed this 18650 battery specifically for high-drain devices. Its high mAh rating ensures that your device will enjoy maximum runtimes. Internal protection circuitry and components make this cell extraordinarily safe. Thermal, overcharge, and over-discharge protections all create a stable, durable workhorse. Features: --Intelligent protection circuit prevents overcharging / over-discharging --Micro-porous barrier on the cell's interior protects internal components --Pressure relief valve activates in the event of sudden temperature increase --Great for LED flashlights and high drain devices --Free from leakage of Liquid Electrolyte Specifications: --Battery Size: 18650 --Battery Chemistry: Lithium Ion (Li-Ion) --Voltage: 3.6V --Capacity: 3500 mAh Dimensions: --Length: 2.67" (67.96 mm) --Diameter: 1.745" (18.58 mm) --Weight: 1.6oz. (46 g) PRC