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lithium ion battery charging Baofeng UV5R

Discussion in 'General Ham Radio Discussion' started by KD2GOE, Apr 13, 2018.

  1. KD2GOE

    KD2GOE W9WDX Amateur Radio Club Member

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    So i have 3 chargers 1 of them is busted.. I would like to make a circuit that will charge the lithium ion battery pack's for the radios.
    They are 7.4v Li-ion 1800mAh to 3800mAh but more like 2600 i would guess you know "China".
    they have a simple the circuit in the charging base i guessing there just dropping the voltage from 10V to 8.4v From pics on the internet of the battery's that are open it looks like they have a circuit board in with the battery's for Controlling the charge? Can i just put a Simple voltage reg in there to drop 10 or 12V down to 8.4v?
    and is there away to add a done charging LED?






     
    #1 KD2GOE, Apr 13, 2018
    Last edited: Apr 13, 2018

  2. Robb

    Robb Yup

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    Are there any Yaesu, Kenwood, or Icom chargers that also use the 7.4v format that have a schematic available you can copy?

    I understand what you are asking, since I also have a Baofeng. Seems that engineering a charger wasn't a high priority for a cheap radio just to get it to market.
     
    #2 Robb, Apr 14, 2018
    Last edited: Apr 14, 2018
  3. KD2GOE

    KD2GOE W9WDX Amateur Radio Club Member

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    I was thinking of that..
    i seen this on Ebay and it may fix in the charging base? do you think this would work?
    if it will i can retro fit the LED


    https://www.ebay.com/itm/TP5100-1S-...906507&hash=item4b1fc43056:g:6x0AAOSwfDhZgxLf
     
    #3 KD2GOE, Apr 14, 2018
    Last edited: Apr 14, 2018
  4. KD2GOE

    KD2GOE W9WDX Amateur Radio Club Member

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    well i think ill be the first one in the water i ordered 1 if it works and is a more "safer" way to charge them ill replace them all with this controller..
    it will add a way to all so charge them on 12v
     

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