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Jul 01, 2016, 07:25 AM
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Why would low mAh batteries be preferred?


I'm looking at a 160mm frame and looking at the recommended parts list. I was surprised that it recommended "11.1v 600-800 mAh" battery. Why would a frame/motor/esc want to limit the mAh of the battery used? Is it weight? I would think if a frame/motor/esc was designed for 3s, that any mAh 3s battery would work and that higher mAh would just give you longer flight times.

Is there another reason the electronics would want lower mAh?
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Jul 01, 2016, 07:27 AM
Team AlienWarpSquad
Weight or AUW is the only reason.
Jul 01, 2016, 07:29 AM
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Quote:
Originally Posted by waltr
Weight or AUW is the only reason.
That's what I thought.

I may be building a 3" quad and it recommends 3s 800mAh but I have a collection of 1300 mAh batteries I was hoping to use.
Jul 01, 2016, 08:38 AM
Team AlienWarpSquad
The smaller the copter the more critical AUW is for performance since these have a lot less thrust due to smaller motors & props.
Example is my Warp Quad 200 with HQ5x4 props and RCX1804-2400kv motors.
I like running a 3S 850mAh LiPo to have an AUW of 260gram. This has pretty good performance but when I use a 1000 or 1300mAh LiPos the increased weight is very noticeable.

Another reason to keep the weight low is reducing damage in a crash. These smaller copters also tend to be weaker and added weight will cause them to break much, much easier.

That 3" quad will probable fly with 1300mAh LiPo but will feel sluggish and will break easier.
The difference can be like driving a truck verse a sports car.
Jul 01, 2016, 04:24 PM
Registered User
Suteki's Avatar
What waltr said,

Dont forget that if you add weight, you need to use more thrust to lug it around, so you pull more amps more consistently so even if you goto a higher capacity battery you won't necessarily increase your flight by as much as you might initially expect, you'll only get a smaller percentage of that extra capacity back in flight time while you actually chew more amps just using it in the first place
Jul 02, 2016, 06:04 AM
My quadcopter is not a drone!
unseen's Avatar
Quote:
Originally Posted by krachall
That's what I thought.

I may be building a 3" quad and it recommends 3s 800mAh but I have a collection of 1300 mAh batteries I was hoping to use.
1300mA/h batteries on a 3" build will handle like a wet sponge.

Depending on the motors and propellers, 450 - 850mA/h 3S is more appropriate. For example, on my Atom122 I have 1105 4000kv motors with 3020 props. 450mA/h gives me around five minutes mixed flight.

My other 3" build uses 1306 4000kv motors and 3040 tri-blade props. I use 850mA/h 3S batteries on that for about the same flight time.
Jul 02, 2016, 06:52 AM
Registered User
yeah i just built my fist 250 and wanted to run 2200mah, the store was out of them and i went with 1800mah and it turned out to be better, now im running 1300mah and have a much faster much more aggressive much more agile machine go the lowest mah you can stand for flight times. its worth mentioning too i dont think flight times were as drastically reduced as you might think. the lower weight seems to mean i still get good flight times from the 1300mah


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