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Discussion in 'Electronic Repair' started by [email protected], Oct 30, 2005.

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  1. Guest

    I just found 8 rechargeable alkaline D cells at the dump. I would like
    to try to charge them but am not sure what the correct way to do this
    is. Can i follow the same procedure i usually use for nicads that is
    10 percent of the rate for about 16 hours? Thanks, Lenny.
  2. mike

    mike Guest

    That is definitely NOT what you want to do.
    You need some real info, but IIRC, they're charged much like lithium.
    Constant current up to a terminal voltage. You need to figger out
    what that terminal voltage is. 1.6V sticks in my mind, but if I'm wrong
    you'll make 'em leak. Look it up.

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  3. Ken Weitzel

    Ken Weitzel Guest


    I wouldn't if I were you...

    I don't have any D's, but do have a few AA's and a charger...

    Perhaps you can interpolate AA's and D's, so checked for you.
    The AA's draw 70 mils until they reach 1.61 volts - then drops
    to 20 ma and looks like it wants to stay at 20 forever.

    There are a few combo nimh/rechargable alkaline chargers out there,
    I know Eveready makes one that takes all sizes, Walmart, about 25
    bucks cdn.

    Remember before you spend too much though, that you found 'em in a
    dump, and there may well be good reason they were there :)

    Take care.

  4. Guest

    Even when they were new.... rechargable alkalines were a bust and did
    not perform well and did not have adequate discharge/recharge cycles.
    Take them back to the dump.
  5. Jim Adney

    Jim Adney Guest

    Are these the Rayovac rechargables? If so, Rayovac sold a special
    charger for them. They are probably available on ebay now for cheap,
    because those batteries have now been discontinued.

    There's a good chance that the batteries you found are dead. Do you
    measure any voltage across them?

    Others have reported these cells to be failures, but I've had good
    luck with them. I'm sorry they disappeared from the market. I still
    have quite a few, and a good charger, so if your cells measure over
    ..5V I'd be happy to take them off your hands.

  6. NN

    NN Guest

    The only point about rechargeable alkaline for me are the 1.5v instead
    of the 1.2v rechargeables which do not work in some devices. They
    also don,t leave in the " dark " without any warning. I never got used
    to it. I use portable lighting every night. Watch out for any
    chinese type "D" cells wether brand name or not. I took one apart and
    it had a "C" size suspended inside. I prefer to do my own D cells out
    of C cells by using a white pvc pipe as a sleeve. There is one
    situation that you can get the same voltage with the 1.2 volt cells.
    I have a 4 cell D size mag that can take five c size in a pvc sleeve
    for equal voltage.
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