Tenergy Rechargeable CR123A Batteries with Smart Charger This package set features 4 rechargeable CR123A Li-ion batteries with a smart charger. The kit also includes an automobile cigarette adapter so that you can recharge your batteries on the go. Meant to be an economical replacement for the non-rechargeable CR123A primary Lithium battery, these will fit in most digital cameras and flashlights with few exceptions. The microprocessor or lamp in SureFire illumination tools will not accept these batteries, so do not attempt to use in SureFire products. The charger features built in protection against thermal, overcharge, short-circuit, mechanical, and polarity reversal mishaps. The delta peak cut off function will also stop charging the battery to prevent overcharge dangers once the battery reaches full charge. Note: These batteries are not compatible with SureFire Illumination Tools. Do not attempt to put in your SureFire flashlight or damage may result.