Battery questions...

Hi guys-

I'm new around here and learning tons by reading your wisdom on these message boards.

I need help understanding which rating of battery I should use for my quad. Right now, with everything except the APM and battery mounted, I'm weighing in at about 950 grams. I am using Turnigy SK3 2826 1130 (10A) motors with 15A ESCs, and will go to 20A ESCs in the near future. I will also add FPV gear and telemetry when I can afford it.

My quad is going to be used primarily in an autonomous flight mode, hovering or flying waypoints. It is not for aggressive or acrobatic flying. I am looking for endurance and reliability with this build. As such, I am wondering what type of Lipo would be best for me.

Even as an Aerospace Engineering student, I am a little confused by all the specs Lipos have. Because I am going for "slow and steady" flight and endurance, I imagine I do not need too much burst power. I also know (I think) that the motors require 4000mAh total, so the mAh and C ratings must equal out to at least 4000mAh. 

1. Am I thinking about this correctly?

2. Can a Lipo fry a motor or ESC if the rating is too high, or does something prevent that?

3. Does a bigger mAh necessarily mean more endurance with the appropriate C rating?

4. Is there any advantage or disadvantage to a 3s vs a 4s Lipo?

Thanks in advance-

Jim

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

Join diydrones

Email me when people reply –

Replies

  • 3D Robotics

    "burst power" is related to the current rating. Modest rating are 30c. Higher current ratings are 40c and above

    4s batteries have higher voltage and a more "lively" performance. If you want something more sedate, go for 3s

    For a standard sized quad, I think 4000mAh is overkill. Try something closer between 2600 or 3200. No need to carry more weight than you need.

This reply was deleted.

Activity

DIY Robocars via Twitter
RT @donkey_car: Human-scale Donkey Car! Hope this makes it to a @diyrobocars race https://www.youtube.com/watch?v=ZMaf031U8jg
Saturday
DIY Robocars via Twitter
Saturday
DIY Robocars via Twitter
Jun 16
DIY Robocars via Twitter
RT @GrantEMoe: I won my first @diyrobocars @donkey_car virtual race! Many thanks to @chr1sa @EllerbachMaxime @tawnkramer and everyone who m…
Jun 13
DIY Robocars via Twitter
RT @gclue_akira: JetRacerで自動走行したコースを、InstantNeRFで再構築。データセットは別々に収集 #jetracer #instantNeRT https://t.co/T8zjg3MFyO
Jun 13
DIY Robocars via Twitter
RT @SmallpixelCar: SPC 3.0 Now the motor also works. This car is doable. I just need to design a deck to mount my compute and sensors. http…
Jun 13
DIY Robocars via Twitter
RT @SmallpixelCar: My new car SPC 3.0. https://t.co/CKtkZOxeNQ
Jun 7
DIY Robocars via Twitter
RT @SmallpixelCar: High speed at @diyrobocars thanks @EdwardM26321707 for sharing the video https://t.co/o4317Y2U1S
Jun 7
DIY Robocars via Twitter
RT @SmallpixelCar: Today at @RAMS_RC_Club for @diyrobocars. Used @emlid RTK GPS and @adafruit @BoschGlobal IMU. Lap time 28s https://t.co/R…
May 28
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
More…