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charging my new 4200mah pack

Discussion in 'HPI Baja' started by spuddy, Mar 6, 2007.

  1. spuddy

    spuddy Member

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    well guys as you know from the posts over on the hpibaja site my first hump pack went into meltdown from shorting out anyway i have put my new pack in today and gave it a charge .
    charged it for 10 mins then discharged it as it says in the details on the paper
    it took hour 1/4 on 4 amps i was watching the mah and when if finished it charged the pack upto 4320 mah
    now tell me if im wrong the pack is only a 4200 how come it went upto 4320
     
  2. Timmahh

    Timmahh Bajastafarian Madnes
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    the numbers are only on an estimated number.

    each cell can hold a bit more or less charge than the cell next to it. all batterys are like this. regardless of make or type.

    my first charge took me to 4647Mah. sounds like your good to go.
     
  3. hndaman1

    hndaman1 Well-Known Member

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    thats about what mine went up too on my durtrax ice charger...I cycle mine out about once week now since my car has been down for the winter months....
     
  4. FastEddy

    FastEddy Well-Known Member
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    Its only measuring the charge that is put into it at that time. If you weren't fully discharged it will show a lower number.

    IE:
    If you were at 50% charge on a 4300, it may only read 2,100 on your charger when it peaks. This is the amount it was charged, not the total charge.

    As stated above, the numbers are only a reference point for the batteries. I have found that after a few cycles they will take a higher charge.
     
  5. teamchrome

    teamchrome Well-Known Member

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    What charger are all of you useing?
    Im thinking of a Superbrain.
    Any thoughts as to what to get?
     
  6. FastEddy

    FastEddy Well-Known Member
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    How much do you want to spend?
    What will you be charging?
     
  7. teamchrome

    teamchrome Well-Known Member

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    Nothing too fancy.
    Im just charging my reciever batts and packs for my Ricky bike.
    Something that can run ac/dc and between 5 to 7 sub c cells
     

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  8. marder69

    marder69 Well-Known Member

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    Sure your banging far to many amps into that battery?
     
  9. Timmahh

    Timmahh Bajastafarian Madnes
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    when i charge my PM 4200, i pump it in at just over 4a to near full, then the charger drops to trickle and charges at .9a. PM recomends 5 to 6 amp charge rate on their IB4200 packs for the baja. I talked to them about React packs too. i ll let you know if they are available for sure!
    T
     
  10. Jeremy1976

    Jeremy1976 Well-Known Member

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    Superbrain 977!!
     
  11. spuddy

    spuddy Member

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    there wasnt much in the pack as i could tell when turning the wheel it was slugish so i put 10 mins worth of charge in it then discharged then charge it at 4 amps .. the charger i have is a Prolux Digipeak V2 Predict Charger which i think is a really good charger.
     
  12. teamchrome

    teamchrome Well-Known Member

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    I haven't seen a 977 whats the diff?
     
  13. teamchrome

    teamchrome Well-Known Member

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    One of the guys I went out to run with was using one and I thought it was nice.
     

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  14. Jeremy1976

    Jeremy1976 Well-Known Member

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  15. Newmer

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    I use the ICE charger, and from what I understand, you can tell the charger to stop when it reaches preset values. You can tell it to stop when the delta peak voltage is reached, or when the Max total current rate of the pack is reached, one or the other. They both work together for safety.
    My ICE charger is set for factory setting of .6mv delta peak. The total current is set for 150%. This means the charger will stop when one of these values are reached. The 150% current rating is actually a bit higher than the delta peak. So the delta peak threshold is reached first. If you change the total current to 100%, when the charger reaches its set 4200mah capacity for the pack, it will shut off regardless of the delta peak value. The battery pack may not have yet reach max capacity, because all cells are built different. Some hold more than others.
    This is the way I understand it. I may be wrong. Best thing to do is read the manual, thats where I got most of this info.

    Newmer