rechargeable flashlight & led flashlights

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The best will have a dedicated battery that is optimized for that , driver, and LED. Some of the top are , period.

With updated battery chemistries and quick times, Maglite feature an ultra-bright LED and additions including a long lasting battery…

The Streamlight 75476 Stinger LED HL is everything you love about the Stinger with high lumens for a brighter, wider beam.

Technology has greatly evolved over time and now we have that guarantee you wherever you are whenever you need it.

http://flashlightwiki.com/Rechargeable

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

Amazon.com: 4 volt rechargeable batteries

Amazon.com: 12 volt rechargeable flashlight