Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

Battery Levels 3s & 4s

Discussion in 'Other DJI Multi-Rotors' started by Browneee, Oct 16, 2014.

  1. Browneee

    Joined:
    Jun 20, 2014
    Messages:
    54
    Likes Received:
    1
    Evening all....

    On my 550 I'm using either 1 x " Gens ace" 14.8v 5000mAh 40c batt or 2 x "Tiger" 11.1v 2800mAh 30c batts

    These are the levels I've plugged in...

    1st Level
    No load 11.8 Loss 1.0 Loaded 10.8
    2nd Level
    No load 11.6 Loss 1.0 Loaded 10.6

    To the experts in this , does this sound right ?

    09:24 until she will not fly anymore using 5000mAh windy day

    09:48 until she will not fly anymore using dual 2800mAh windy day

    Ok there's lots of discussion how to get greater flight times. I've resigned to this time limit. What my question is. Do those levels sound right ?
    And do those levels work for the two different battery combinations ?

    Flame Wheel 550
    NASA
    DataLink
    DR16 receiver
    FeiyuTech gimbal + GoPro riding on two carbon rails out front using Batts as counter weight.

    Regards Browneee
     

    Attached Files:

  2. CallMeAlan

    Joined:
    Apr 26, 2014
    Messages:
    203
    Likes Received:
    23
    Location:
    Newbury, UK
    Re: Battery Levels 3s & 4s

    Looks like you have a 4S ad a 3S there, judging by the voltages you mention, 4s being 14.8 V and a 3S is 11.1 V. You can't use the same cutoff levels for both. If you switch from one battery to the other you need to go in and set the 80% rule levels for each. If you run your 4S to 11 volts it's bye bye battery, possibly even bye bye Flamewheel. You need to stick to 3S or 4S throughout, or take your laptop and reset in the field when switching batteries.

    Edit - your subject line confirms you have 3S and 4S.
     
  3. Browneee

    Joined:
    Jun 20, 2014
    Messages:
    54
    Likes Received:
    1
    Ok that confirmed a gut feeling I had. With this levels mentioned above "OBVIOUSLY" using the dual batt set up just felt comfortable.

    So ok .... What's this 80% rule then ? Batteries are white mans magic ?....
     
  4. OI Photography

    Joined:
    Sep 23, 2013
    Messages:
    5,542
    Likes Received:
    17
    Location:
    Clarksville, TN
    Re: Battery Levels 3s & 4s

    This is an excellent primer on everything you need to know about Lipo batteries: http://www.rchelicopterfun.com/rc-lipo-batteries.html

    It's a deep read, but if you scroll about 1/3 of the way down the full page, you'll find a section with a green title called "THE 80% RC LIPO BATTERY RULE TO THE RESCUE!"
     
  5. Browneee

    Joined:
    Jun 20, 2014
    Messages:
    54
    Likes Received:
    1
    Thanks Ol