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    Lipo Battery Voltage

    Hi,

    This is if you want your Lipo batteries to stay healthy and last longer.

    Your Lipo battery voltage should not be discharged below 3.8V per cell at the end of a flight. If it is lower you need to reduce your flight time.
    This means at the end of a flight,
    for 3S, the battery voltage should be at least 11.4V
    for 6S, the battery voltage should be at least 22.8V

    In any case, do not let your Lipo battery discharge below 3.75V per cell.


    If you are not going to use your battery for a while, you should charge/discharge the battery to about 3.95V per cell (i.e. for 11.9V for 3S and 23.7V for 6S).
    Facebook - http://facebook.com/daddyhobby

    #2
    Thanks zenm.

    I want to add that please take note if discharged to 3.8v, usually means the full capacity is not utilised. Thus to reach 3.8v, you have only used about 50%of the rated capacity of the battery.

    So do not be surprised or suspect that your lipo are spoil if you realise that you can't charge back the full rated mAh when charging from 3.8v.

    Correct?
    Hanger
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    Comment


      #3
      Originally posted by elmosan View Post
      Thanks zenm.

      I want to add that please take note if discharged to 3.8v, usually means the full capacity is not utilised. Thus to reach 3.8v, you have only used about 50%of the rated capacity of the battery.

      So do not be surprised or suspect that your lipo are spoil if you realise that you can't charge back the full rated mAh when charging from 3.8v.

      Correct?
      As a rule, we should never discharge the Lipo more than 80% of its full capacity. At 3.75V, the battery will be at 20% of its full capacity.
      So, at 3.8V it will be slightly more than 20% capacity left.

      Yes, if the battery is charged at 3.8V, when fully charged the charger will show a charged amount less than the full battery capacity.

      The battery is fully charged at 4.2V per cell, irregardless of the initial battery voltage when the charging starts.
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        #4
        Yes, thanks ZenM,

        Wise battery saving tips...

        but who would'nt like to see tareq alsaadi fly his devil helicopters with cells charged up to 4.25V? Really spectacular power and smackdowns with awesome speed!

        International competition pilots regularly charge to 4.22V for flights.

        Then again, there is the rest of us who want to get every precious cycle out of our lipos...
        Hanger
        Hirobo XRB SR Lama
        Hirobo Quark SRB
        Hirobo Quark SRB SG
        Eflite Blade SR (For Display)
        Blade450 3D
        MSH Mini Protos (SOLD)
        COMPASS 6HV (Combat Fit PES A)

        Plane
        Dynam PBY Catalina 1.4m
        FMS J3 Cub 1.4m
        Artech F14 Tomcat EDF
        HK FLYJET EDF
        Artech Skyfun
        Dynam P51D Mustang
        Parkzone P51

        Tx:
        Futaba 6J 2.4GHz(SOLD)
        Spektrum DX6i
        DX8
        Futaba 9CAP

        Comment


          #5
          Yes correct guys. REVOLECTRIX supplied a 12S pack to Rhu at the Bukit Batok closing even earlier on in the year.
          What we didn;t tell him is we used the REVOLECTRIX PowerLab and via the CCS software to tweak the end of charger voltage to 4.28. Its safe to do so even up to 4.3ish. It blew him away.

          We did the say for DSO for the UAV DARPA games to give them about a 25% energy increase in their battery system.
          Revo John
          REVOLECTRIX Singapore
          1090 Lower Delta Rd #03-01
          Singapore
          [url]www.revolectrix.com[/url]

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