New original Sanyo 18500 battery 1300 mAh. Tested 3.75V +/-0.2v, Lot of 2 Pieces | eBay
Amazon.com: JESSPOW 18500 Rechargeable Batteries 4 Pack with Charger, IMR 18500 Rechargeable Li-ion Battery 1600mAh 3.7V [ for Flashlight, Solar Garden Light ] with Flat Top : Health & Household