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  1. #1
    RC poster
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    Jul 2014
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    Newbe wanting to charge my NIMH's correctly

    Hi guys, my first post and I have done some searching before posting.

    I have just bought a second hand e-maxx and so have now bought two packs of 8.4v NiMh 3800mAh.

    I have also bought the [a] Charger and I would like to charge both packs together in series using a cable that I have bought.

    The charger is capable of charging at many voltages, amps and has a timer but I am not sure how to calculate what I need to set it to do as I am connecting the packs in series.

    My thoughts are as they are in series, it is like having a single 14 cell battery at 16.8V and 7600mAh - is this the correct assumption? If it is, what would be the ideal charging cycle if I am not in a rush between each use but want to extend the life of the packs?. What I mean is that I am happy to wait overnight for any discharge/charge cycle to complete if that helps the batteries. If it makes little difference then I may as well charge them quicker.

    So any suggestions for charging voltage, amps and time?

    Also, the charger can do a discharge cycle first which is also configurable - any idea what I should set it to do?

    Many thanks for your help. I have had the car a week now and not got to use it because I couldnt work out how to correctly charge the batteries!!

    Thanks, Ian

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    Last edited by ksb51rl; 07-16-2014 at 08:02 PM.

  2. #2
    RC Champion Jimdog's Avatar
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    Sep 2011
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    I wouldn't use the discharge function. In series the batteries would be a 3800mah 16.8v pack. Charging them in series should be fine. Just make sure to charge the packs separately every once in a while to make sure they are somewhat balanced. Set the charger at 3.8 amps. You probably don't need the timer. Ideally you should charge them individually.
    Whatever you are, be a good one.

  3. #3
    Marshal ksb51rl's Avatar
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    Nov 2006
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    Northern NJ
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    The only correct and safe way to charge those packs is one at a time.

    BTW, series connection adds voltage, not capacity (mAh).
    Alt-248 on the number pad =

  4. #4
    RC poster
    Join Date
    Jul 2014
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    2
    Thanks for the info guys. I will give it a go.

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