Power your Olight S30R II, S30R III, or S2R Baton LED Flashlight with this 3.6V Customized 18650 Rechargeable Lithium-Ion Battery, which features a capacity of 3500mAh. As it is not subject to any memory effect, the cell's full capacity will continue to be usable after each charge cycle, regardless of whether it is fully or partially drained beforehand.