6V 12amp lead acid charge ?

Discussion in 'General Archery Forum' started by whitetail99, Sep 1, 2007.

  1. whitetail99

    whitetail99 Senior Member

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    What would be the ideal charge 6V 12amp lead acid battery. What i mean what should the volt meter read after charging 6.3 / 6.4 / or higher {7.0}.
     
  2. QSA

    QSA One eyed/Gutless wonder

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    aaaaa 6Volts. 6 Volts is 6 Volts
    Am I wrong.
     

  3. Ronhop

    Ronhop RIP

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    You should be measuring amp draw from the charger and not volts.
    If the amperage draw is well above zero, the the battery is still charging. If the amperage is near zero or zero the battery is done charging. If you are not using a battery charger with an amperage gauge, get one that has one. Or get an automatic charger that decides for itself, based on amperage, when to shut off and go into a maintenance mode. They are not expensive...

    Ron
     
  4. HYTMANN

    HYTMANN Senior Member

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    I concur with Ronhop about ampereage and chargers. FYI a 6 volt lead acid battery fully charged produces 7.2 volts; each cell should be producing 1.2 volts if they are not sulfated.:cool: :rockon:
     
  5. whitetail99

    whitetail99 Senior Member

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    Thank you .. that was what I was looking for.

    Ronhop
    thank you for the info. Any chance I could use my multi function electrical meter to reading the amperage draw?
     
  6. HYTMANN

    HYTMANN Senior Member

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    As long as the meter can handle the amperage rate of the charger, it should not be a problem, or if ya want, pm me and you can use my charger for a couple of days Tim.:biggrin1:
     
  7. Ronhop

    Ronhop RIP

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    Yes, I agree with HYTMANN.

    Your DVM needs to handle the charge amperage. I have a nice bench DVM that can only deal with 10 amps. Most if not all are fuse protected so worst case you blow a fuse if you go that route.

    Good luck.

    Ron
     
  8. Ronhop

    Ronhop RIP

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    I didn't know that... I though the 1.2 V per cell was from Ni-Cads in series and not a lead acid battery.

    I have not used a 6V lead acid battery in ages so I'm out of touch.

    In any event, amperage draw from the charger to the battery is the key to charging and not peak voltage.

    Ron
     
  9. HYTMANN

    HYTMANN Senior Member

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    Lead acid and NiCD both have the same volts per cell. Charging lead acid cells with amperage drop is the best way to go, however with both NiCD and lithium polymer batteries (Lipo's have 3.7 volts per cell) charging at constant amperage is preffered, until negative delta shift occurs in the NiCD (minute voltage drop) which occurs due to internal resistance as a result of temperature increase, and with Lipo's charge cutoff should be set for the maximum voltage, overcharging them even a tiny bit will weaken and shorten life, and possibly burst the cell:wave: .
     
  10. whitetail99

    whitetail99 Senior Member

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    Very informative. So in a nut shell its the amps that are the best measure of batteries charge.:frusty:
     
  11. Ronhop

    Ronhop RIP

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    Yes, I used to race electric RC cars and the charger I had was a peak detection type... I never messed with Lipo batteries. All I know is that they sell ceramic pots to put your batteries in while sharging in case they blow up or whatever... Sounds like dangerious stuff to me.

    Thanks for the info...

    Ron
     
  12. Ronhop

    Ronhop RIP

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    Yes.

    Ron
     
  13. retread

    retread Junior Member

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    battery voltage

    A 6volt lead acid battery has 3 cells @ 2 volts each.

    charge voltages are:
    full charge 6.3 volts
    75% 6.2 volts
    50% 6.1 volts
    25% 6,0 volts

    Charge the battery, unhook the charger, and allow the battery to sit for several hours to allow surface charge to dissipate before testing.
    To charge a 12 amp battery use a charger with 1.5 amp output or it will fry the battery.
    Load testing is probably the best way to find out if a battery is good.

    Bill