Lipo 20C vs 40C, only 0.1 min hovering difference

I want to buy some new Lipo for my Arducopter. The existing I am using is 3S 2200 20C.
I was thinking to go to 3S 2200 40C.
But using eCalc (see below), I did notice the hovering time for a quad is increased with only 0.1 min.
I am interested for hovering in principal (for aerial pictures) and not acrobatic.
Is worth to go with 40C (more expensive) or should I continue with new 20C?

I am well content with 2 x 3S 2200 20C in parallel, this is really a big difference.

3691060958?profile=original

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • It's also widely recognized that the C ratings for batteries are grossly inflated and should not be taken literally.

    It's mostly useful as a comparison of two different batteries from the same vendor.  Higher C rating has lower internal resistance, and might cost more, weigh more, have heavier wire gauge, or be better matched.    Beyond that, I wouldn't assign any actual units.  (I don't think they can actually run at max C discharge without damage.)

  • OK, thanks for all reply. I had under impression that C factor could increase the time, but I was wrong.

    My battery is warm (normal) after 7-8 min of flying at 25 deg C, but never hot.

    I will stay on 20C and for longer time I put 2 in parallel, or I will go for a higher MAh.

    So eCalc was correct.

  • Your 2200 3s 20C have a max continuous discharge of 44amp. Are your batteries hot after flight?
    My copter hovers @ 17-24amp depending on weight. Flying aggressively, hard turns @ full throttle, rarely spikes above 35-40amp. So my max burst current draw is only 2/3 of the lipo's max continuous rating.
    The closer your draw is to your C rating, the harder your lipos have to work. A V8(High C) motor is overkill if you're grocery shopping. But a V6(Low C) has to work so much harder when towing a trailer, or racing on the track. The lipos get hot fast.
    Sounds to me that you're looking for a daily commuter.(AP) If a 2200 20C keeps you in the air, isn't too hot after flight, and performs to your satisfaction, a 44amp discharge is more than enough. However if they are getting hot, a higher C would help.
    If you want longer flight times, you need bigger/more(parallel) batteries.
  • The C number is about the max. load and not about capacity.
This reply was deleted.

Activity

DIY Robocars via Twitter
May 15
DIY Robocars via Twitter
May 14
DIY Robocars via Twitter
May 13
DIY Robocars via Twitter
RT @f1tenth: Say hi to our newest #F1TENTH creation for @ieee_ras_icra next week in Philly. It’s going to be huge! 😎 🔥 @AutowareFdn @PennEn…
May 13
DIY Robocars via Twitter
May 11
DIY Robocars via Twitter
May 8
DIY Robocars via Twitter
RT @SmallpixelCar: Noticed my car zigzagged in last run. It turned out to be the grass stuck in the wheel and made the odometry less accura…
May 8
DIY Robocars via Twitter
RT @SmallpixelCar: Test my car. RTK GPS worked great. Thanks @emlid for their support. https://t.co/EkQ6qmjmWR
May 8
DIY Drones via Twitter
RT @chr1sa: @kane That's @diydrones circa 2009. Still have a box of those Canon cameras that we used to strap into planes, just like this.…
May 3
DIY Robocars via Twitter
RT @chr1sa: Our next @diyrobocars race is going to be outside at a real RC racetrack in Fremont on May 28. Fully autonomous racing, head-to…
Apr 30
DIY Robocars via Twitter
RT @f1tenth: Our Spring 2022 F1TENTH course @PennEngineers is coming to an end with a head-to-head race as a big finale. So proud of our st…
Apr 26
DIY Robocars via Twitter
RT @DanielChiaJH: I wrote a thing! Throughout the development of my @diyrobocars car I've been using @foxglovedev Studio to visualize and d…
Apr 23
DIY Robocars via Twitter
RT @SmallpixelCar: My new car for high speed. Low body, everything ( @NVIDIAEmbedded Jetson Xavier NX, @emlid RTK GPS, IMC) under the deck…
Apr 23
DIY Robocars via Twitter
Apr 21
DIY Robocars via Twitter
RT @f1tenth: F1TENTH Race training setup @PennEngineers for our upcoming ICRA2022 @ieee_ras_icra competition. @OpenRoboticsOrg @IndyAChalle…
Apr 21
DIY Robocars via Twitter
RT @fatcatFABLAB: Proud to be hosting a restarted DIY Robocars NYC Meetup April 26. Come by if you want to talk about and race self-driving…
Apr 17
More…