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The best will have a dedicated battery that is optimized for that , driver, and LED.

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Most agree the is a much better choice (they have a longer lasting battery compared to AA and AAA ).

https://en.wikipedia.org/wiki/Rechargeable_battery

https://en.wikipedia.org/wiki/Rechargeable_alkaline_battery

https://en.wikipedia.org/wiki/Rechargeable_calling_card

Amazon.com: rechargeable tactical flashlight

Rechargeable Tactical Flashlight | eBay