How do USB rechargeable AAA 1.5V Lithiums work?

Discussion in 'Electronics & Electrics' started by Hawns, Nov 9, 2018.

  1. Hawns

    Hawns Member

    Oct 2, 2006
    Has anyone pulled one apart?
    I assume it's a Li-Po cell inside a AAA shell, with a miniature charging/voltage regulation circuit inside at the micro USB plug end.

    If that's true, does that mean i can hijack the internals and swap it for a smaller and lighter LiPo cell (say 100mAh)? Or is there another simple solution for supplying 1.5V via a rechargeable Li-Po cell, like a tiny charging/voltage regulation circuit i can buy?
  2. slavewone

    slavewone Member

    Jul 9, 2002
    B.Mtns2774 Status:Unhappy
    I find these work fantastic in anything that is too picky to use NiMH or sufferers as the voltage drops.

    Yes, It’s a 3.7v Lipo cell with circuitry to maintain 1.5v out. The circuitry cuts out when the battery gets too low and handles the charging too.

    I get mine from Hobbyking, their recent (current?) battery sale sucked me in and Dad now has D versions in his 6v dolphin torch.
  3. @rt

    @rt Member

    Nov 30, 2005
    I’ve used the 3.6V 18650 cells like that, and are essentially the same thing.
    A shorter battery of lower capacity to fit the charging circuit.
    They can’t provide much current, and are permanently destroyed if used in a vape device or similar.

    To develop 1.5V Li-Po AAA cells, I imagine would have been much easier.

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