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what's the difference between batteries?

Discussion in 'Other DJI Multi-Rotors' started by Meinthai, May 7, 2014.

  1. Meinthai

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    Hi All

    I'm having trouble getting my head around the different battery types out there.

    I'm planning to buy a DJI F450 with the DJI E300 motor set from a shop online in Thailand (I live in Thailand) But due to language differences I can't ask questions or fully understand the answers. The shop is recommending this battery. 6200mah 3s 30c.

    http://twinprohobby.com/index.php?page= ... category=9

    But I see there is also a 4s and a 6s version of this battery.
    http://twinprohobby.com/index.php?page= ... category=9
    http://twinprohobby.com/index.php?page= ... category=9

    Can some one explain what these things mean and the differences or pros/cons of

    1) mah
    2) 3s, 4s, 6s etc
    3) 25c, 30c, 40c, etc

    What is the best way of choosing a battery?

    Looking forward to some clarity from the experts :) :)
     
  2. EMCSQUAR

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    I'll give it a shot to help explain for ya.

    mah = milli amp hours. Ideally the higher the # the more flight time you'll get (in theory)

    3S,4S, 5S, 6S = the # of cells - 3S = 3 cells of roughly 4.2 volts each (at max charge) a 4S would be 4 cells at 4.2 volts each.

    Maybe this will help in your last question - https://www.youtube.com/watch?v=JuOn17ovuwU

    For your iniatial question for proper battery for your 450 project - The 3S 6200 mah would be OK, but a 4S would be abetter choice. The 5S and 6S are not recommended to the E300 ESCs - If you wanted the bigger option you'll need to go w/E600 set up. I have E300 with 4S 5000mah battery on a 450 Kong copter and I get 12+ mins. With a 3S 5000 mah battery I get 5:30 mins.

    Hope this helps...
     
  3. OI Photography

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    Everything EMC said above is pretty much right on the money, though I might say using a 3S on a 450 would be fine if you're not weighing it down too much.

    If you have the time to do a deeper dive in to the subject, here's a great reference with everything you need to know about lipo's: http://www.rchelicopterfun.com/rc-lipo-batteries.html
     
  4. Meinthai

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    Thanks guys that was brilliant and told me just what I needed to know.

    Incidentally when watching that video I found an interesting link that shows how the batteries are made

    https://www.youtube.com/watch?v=F6A9PBqTLvc
     
  5. Gizmo3000

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    Keep in mind that if you go with a 4s , you might want to consult with the E300 specs to figure out which prop would work best with the 4s., since the motors will be spinning faster.
     
  6. JTheed

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    The props that come with the E300 set will be just fine with either the 3s or 4s battery as I have used both on mine and the only difference was flight times.
     
  7. FangsCPO

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    So which prop size provided more flight time?
     
  8. JTheed

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    Flight time difference attributed to 4S over 3S battery, not props. Besides, are not the props that come with the E300 supposed to be balanced and tuned no matter which battery you use? No hard data yet on times.
     
  9. FangsCPO

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    So you basically have no answer after stating that you've tried both and the only difference was flight times. Just keying in on what you stated. I mistakenly assumed you had times already. Okay.