Which battery should I use for an brushless motor

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1

HI there!

Fot this motor

http://www.nex-robotics.com/products/quadrotor/920kv-11-1v-brushless-dc-outrunner-motor.html

which battru should I use?

for batteries you can refer 

http://www.nex-robotics.com/products/batteries-and-chargers.html

Thanks

 

2

A matched motor driver for

A matched motor driver for that motor said it can use a 2-4 cell battery, so 7.4V to 14.8V battery.

3

okay, thanks.Whats that 20C

okay, thanks.

Whats that 20C discharge thing with the battery.

Does the mAH value of battery matterin this context?

Along with that motor I wana drive 4 servos.

4

"C" is peak discharge rate

The 20C is a peak discharge rate. 20C is generally pretty high - in fact many packs can’t actually deliver 20C and it’s marketing lies.

 

 

5

This one

http://www.nex-robotics.com/products/batteries-and-chargers/lithium-polymer-3cell-11-1v-4000mah-20c-discharge-battery.html

Be careful when charging it - it doesn’t seem to have balance leads - none of them do. So ideally charge it outside.

If that weight is too much, or it’s too expensive, or physically too large,  then this one would do - but it won’t last as long between charges:

 

http://www.nex-robotics.com/products/batteries-and-chargers/lithium-polymer-3cell-11-1v-1800mah-20c-discharge-battery.html

 

With LiPo’s you MUST be very careful discharging them. I would very strongly reccomend you buy one of these:

http://www.nex-robotics.com/products/batteries-and-chargers/protection-circuit-for-3-cell-li-po-battery.html

 

or build your own. On a personal note, I wouldn’t let a 11.1v LiPo set get below about 10.2v without starting to worry. 

If the barries discharge too much - and if your lucky - you will ruin them, and they’ll never charge again. If your unluckly, they will buckle ( physically blow out of shape ) and then when you charge them they can burn rather spectacularly.

 

 

 

6

What about that motor should

What about that motor should I use that 1? 

Or what can you suggest?

7

Makes me wonder about those

Makes me wonder about those 30C packs I’ve seen…