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  1. #1
    RC Competitor
    Join Date
    May 2009
    Location
    Netherlands near Amsterdam
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    60

    newbee lipo cut off question

    I have decided, i will go LIPO on my slash.
    Lipo charger, 220v with built in balancer and 2 cells lipo's (not 3)

    But i keep reading on voltage protection. IN car i mean.

    So how is that done? Some ESC's have it built in, when under voltage X then stop, my LRP brushless 5.5t and up esc does not have this.

    Do all / some lipo batteries have it built in?

    Is yet another 'in between batterie / esc part' necessary ?

  2. #2
    RC Qualifier
    Join Date
    Apr 2009
    Location
    Brooklyn Park, Minnesota
    Posts
    499
    yea i believe a lva is not a optional piece unless you want to f up your batteries . . .go to maxamps.com and search for an lva i think i heard maxamps makes one.
    3sLipo / VXLSlash

    PLZ PM Gearing For Gladiatorz

  3. #3
    RC Qualifier
    Join Date
    Sep 2008
    Location
    Stockton, Ca.
    Posts
    928
    It is built into some esc what is the model number of your esc have you checked the manuel. If it does not have a Low voltage cutoff (LVC) you need a seperate LVC or Low voltage alarm (LVA) that is compatiable with your esc something like this

    http://www.rcplanet.com/Novak_Smart_..._p/nvk5472.htm

    http://www.maxamps.com/2S-LVA.htm

  4. #4
    RC Champion
    Join Date
    Feb 2009
    Location
    Sacramento
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    1,861
    get a novak
    this doesnt work for the water proof xl5 esc tho

    http://www.maxamps.com/Novak-2S-SS.htm

  5. #5
    RC poster
    Join Date
    Jun 2009
    Location
    Sweden
    Posts
    17
    It's VERY noticeable when a LiPo starts to run out. Basically you go from full power to a significant drop in power over like 10-15 seconds so you really notice it and have plenty of time to stop and disconnect the battery before it goes to low.

    Since LiPo's give you all they've got until they are empty you notice the drop a lot easier then with a NiMh that slowly drops in power as you go.

    I've run several cars and brands of LiPo's without cut-off and never had one go bad because of low voltage. So don't panic about the Cut-Off just don't keep driving when you notice that the power drops with like 70% and you will be fine.

    I ran my stock slash (XL-5 ESC) with 2S LiPo's for example.
    Sidewide-lineon 'Rockstar' Slash

  6. #6
    RC Competitor
    Join Date
    May 2009
    Location
    Netherlands near Amsterdam
    Posts
    60
    Okay all, it is finally clear to me, thanks for all the replys!!

    My esc does not have lvc, so i need such a in-between esc and receiver cut off.

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