Will 14500 batteries (rechargeable) work in most AA 2x lights?

MTHall

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Apr 16, 2020
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I want to get a charger that will accept both 14500 and AA batteries. Can I use both sizes in most Olight, Fenix and Nitecore 2AA lights?
Thanks very much.
 

ilikeguns40

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Mar 8, 2022
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Western PA
You would only be able to use one 14500 3.7v with a dummy AA. Using two 3.7v 14500 will put the voltage around 7.4v and will more than likely fry the LED. I recommend using Eneloop AA rechargeables

14500 are the lithium ion version of a AA that are 3.7v

AA Primary batteries voltage are around 1.5v
 

troutpool

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Apr 22, 2010
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Arizona
Yes, be careful with this. Look up and know the voltage range each light is rated for and don't exceed the maximum. Using one cell and a spacer in a 2-cell light can be a good option sometimes.
 

Hooked on Fenix

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Dec 13, 2007
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3,099
No. Most only work with alkalines, NiMH, and maybe lithium primaries. Some can go up to 4.2 volts. Very few can handle 2 14500s. The Fenix LD22 V2.0 will work with 2 14500s.
 

PhotonMaster3

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Aug 9, 2020
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103
I can confirm that. A few years ago I stuck a pair of 10440 batteries in a Nitecore pen light designed for AAA.

Ha well the brightness was great… until it fried a few seconds later
 

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