Charging from a Leisure battery question

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  • Simon Bee
    Member
    • Oct 2021
    • 135
    • Leeds UK
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    #1

    Charging from a Leisure battery question

    I want to charge up my batteries in the field. The battery I’m looking at is a YUASA 12v 95amph battery. Just wondering how many charges of a 6S 4500 @30% charge to full from this battery I could get
  • OV10
    >>>Twins are 2X the Fun<<< (Squawk Moderator)

    • Sep 2014
    • 4264
    • Owego, NY
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    #2
    Hello Simon Bee

    Most RV batteries will provide about 50-60% of its labeled Ah rating before the voltage falls below what most 6S LiPo balance chargers require before hitting low voltage suspend charge mode.
    For ballpark calculations, the 6S 4500 @ 30% is gonna require about 3500mAh of juice to attain a full charge.
    Derate the YUASA down (50-60%) from 95 to 52 (median of the derate %) and divide by 3.5 (3500mAh) = approx 15 charges
    A good 15amp 12v charger will also be an important piece of equipment for keeping the Yuasa in good condition.

    Best Regards,
    Warbird Charlie
    HSD Skyraider FlightLine OV-10 FMS 1400: P-40B, P-51, F4U, F6F, T-28, P-40E, Pitts, 1700 F4U & F7F, FOX glider Freewing A-6, T-33, P-51 Dynam ME-262, Waco TF Giant P-47; ESM F7F-3 LX PBJ-1 EFL CZ T-28, C-150, 1500 P-51 & FW-190

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    • Simon Bee
      Member
      • Oct 2021
      • 135
      • Leeds UK
      • Send PM

      #3
      Originally posted by OV10
      Hello Simon Bee

      Most RV batteries will provide about 50-60% of its labeled Ah rating before the voltage falls below what most 6S LiPo balance chargers require before hitting low voltage suspend charge mode.
      For ballpark calculations, the 6S 4500 @ 30% is gonna require about 3500mAh of juice to attain a full charge.
      Derate the YUASA down (50-60%) from 95 to 52 (median of the derate %) and divide by 3.5 (3500mAh) = approx 15 charges
      A good 15amp 12v charger will also be an important piece of equipment for keeping the Yuasa in good condition.

      Best Regards,
      Great, very helpful thanks 🙏

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