Do Rechargeable Lithium-Ion AA Batteries Exist?

Do rechargeable lithium-ion batteries exist in standard sizes like AA, AAA, C or D?

Yes, they are finally available. A company called Kentli has released AA and AAA rechargeable lithium polymer batteries that output 1.5 volts.

Kentli batteries are available on Amazon here.

Update October 2019: I also found Tenavolt batteries which are cheaper than the Kentli, however I have not tested them.


Lithium-ion batteries normally operate 3.7V per cell — but Kentli put circuitry inside the cells to reduce the voltage to 1.5 volts. The company claims that the batteries have a capacity of 2800mWh which matches Eneloop Pro (the NiMH batteries with the highest capacity).

Additionally, Kentli batteries are lighter than Eneloop Pro. However, they are more expensive. A four pack of Eneloop Pros costs about $17, whereas a 4 pack of Kentli cells costs about $34.

Sanyo XX "Powered By Eneloop"

Other Lithium-Ion Rechargeables


There are also some lithium-ion rechargeable batteries made for high-performance flashlights and cameras, in these sizes: 18650 and CR123.

A single 18650 battery can replace two CR123A batteries, although at a lower voltage (but much higher amperage). However, the 18650 is a wider cell and will not fit into a flashlight that is designed strictly for the narrower CR123As. Most modern tactical LED lights are designed to use a single 18650 or two CR123As, but it’s best to check before buying. See our article on The Best 18650 Batteries for more information.

There are also numerous other types of lithium-ion batteries made for specific laptops and other electronics gadgets. There is currently no standard size for these lithium-ion cells.

Comments 9

  1. How do I get my hands on your lithium AA battery’s and charger, and how much will it cost me,

    1. Post
  2. I’ve used the Eneloops before and really liked them. They worked great and kept their charge for a long time. I’ll have to try the Eneloop Pro!

  3. I purchased two solar powered garden lights. they have AA 3.7V 600 mAh Li-ion batteries with a 14500 number. Do you know if there is a replacement battery for these, since they are very difficult to find? I am about to give up on finding any.

  4. I’m surprised nobody has done a double-AA L-iIon or Li-Po battery – same form factor as two AAs next to each other without the extra voltage circuitry (assuming things can handle a bit extra voltage). Depending on how the “connection” is done, there could be room for quite a bit of extra power.

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