This is a battery we recommend for our ARC 350 LR-M & LR-H Product Description A high-capacity 18650-format lithium-ion cell delivering 3500mAh at a nominal 3.6V, engineered for devices that demand extended runtime without sacrificing a standard cylindrical footprint. Built on a lithium cobalt oxide cathode with a graphite anode for consistent discharge performance, the INFORCE 18650 packs 12.6Wh of energy into a 48.44g cell. Specifications Model INFORCE 18350 Chemistry Lithium Cobalt Oxide (LiCoO₂) cathode, graphite anode Nominal Voltage 3.6V Nominal Capacity 1100mAh Energy 3.96Wh Weight 24.68g Form Factor Cylindrical, 18mm × 35mm (18350 standard) Physical State Solid, black