which batteries to choose for quad?

Making a quad, first of all ill use 4 23oo kV motors, and my esc is 12 A and it says its for 2-4S LiPo batteries, if i want flight time to be around 20 minutes, which battery should I go with? Also another thing, im afraid ill drain the lipos too much, do the remote control transmitters usually indicate when quad lipos are getting too low? (im planning to get a flysky) or will i have to connect some sort of voltage indicator on my quad?
Thanks
 
What kind of flying are you wanting to do? 2300kv is usually for 250ish size quads, and batteries usually range from 1300 - 2200mah for those.
 
yep planning to make a X shaped 250 quad. So does more mA mean more flight time?
Yes, but more weight means less flight time and lower quality flight time. Getting two 1200mAh-1800mAh will give you the best of both worlds on most setups where as a 2.2Ah is a little heavier and won't give you much more flight time.
 
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