ON THE WAY&reg;16340 1000mah 3.7V Rechargeable Li-ion Battery (Pair) with Charger Combo Li-Ion Rechargeable 16340 with IC Protection Charges 1 or 2 batteries at the same time Can be charged over 500 times With overcharge / discharge protection function that you can use it without worry. Can be used in laser pointer, Led flashlights torch and other electronic products,Warm tips: Before purchase, please make sure the battery voltage corresponds with voltage mark on your device