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  1. #1
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    Raider

    How to discharge NIMH Battery

    20 years ago when I last played with RC's my charger had a switch on it that I could flip from Charge to Dishcharge.

    Is this still how folks dishcharge their batteries? I ask because the charger I got with my car does not have a discharge feature - is that because I got a cheapo charger or is that because people discharge batteries differently these days.

    Also I used to be able to just stick the throttle open and it would discharge the battery on the the older RC cars (talking late 80's here). WIth the Raider it has some sort of cut off preventing that from happening. Is there a way to bypass this cutoff so I can discharge my NIMH?

    So what do you say - how do folks discharge their batteries these days or is it something of the past and I don't even need to worry about discharging anymore?

    Thanks - drevil

  2. #2
    Super Moderator Jam's Avatar
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    Hi Drevil,

    As I understand it NiMhs do not require deep discharges in the same way as older NiCds did, infact deep discharges can reduce the life of a Nimh battery. Maximum recommended discharge for a 7.2v 6C should be around 5.4v which is what the Nimh cutoff on the MEGA esc is set to. For the Fury guys, if you're running a 7C 8.4v battery then use the automatic cutoff setting (1).

    Lipo batteries remove this issue of cycling and discharging, they also don't suffer from memory effect like nickel batteries do. The downsides are that you need a specialised charger, a lipo charging bag and to always ensure that the battery cutoff is set to Lipo mode on the ESC, lipos if overdischarged don't degrade like Nimhs do, they can EXPLODE!! :S

    Hope this helps Drevil.

    Jam.

  3. #3
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    Raider
    Thanks for the info Jam - That makes me feel much better that I am not doing damage to the battery for not discharging it. LIPO is for sure in the future but for now need to use the NIMH that we got with the units.

    THanks again for the info - drevil

  4. #4
    Junior Member
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    Raider
    For the Fury guys, if you're running a 7C 8.4v battery then use the automatic cutoff setting (1).


    thats good to know i have been running one in my RAIDER
    on the normal NIMH setting

    i guess i better switch it to LIPO cut off
    [2 cell cut off} correct?
    anyway thanks for the info

  5. #5
    Super Moderator Jam's Avatar
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    If you're running a 7C you don't want to discharge it lower than 6.3v ideally, the Lipo cutoff is set to 6.0v is a touch low but you won't deep discharge and damage a 7C with an 0.3v overdischarge.

    Either the automatic cutoff mode or the Lipo cutoff mode will be fine if running a 7C Nimh, if running a Lipo or Life battery where overdischarging is more critical, always use the correct battery setting.

    Jam.

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