So I’m going 5inch. I’m building a 6s Source 1 V5, with iflight XingEs and a Speedybee F405 stack.
I cant decide what size battery to use. ATM the focus is on crusing around and learning, maybe the odd Split S. Could I get away with a 1800mah to get a bit more flight time? Then maybe a 1500mah for more freestyle and possibly a go pro?
You want to look at 1100-1350mah, esp with a go pro. I got some stonking 1500’s and ain’t great! Wanna look at around 600-700g AUW, so look at what your quad weights and look at specs of batteries… Actually will check mine with various bateries on board (I dont run a gopro)
Naked - 423g
1100mah CHBL - 211g - AUW 634g
1350mah - GMB - 211g - AUW 634g (interesting…)
1550mah - GMB - 267g - AUW 690g
The GMB 1550mah is a honking great thing. I prefer the 1100 CHBL tbh, though the GMB 1350 sag a lot! I dont use the 1550mah anymore on it, just… hmmm
Oh the expensive tattu 6S I used, cell died after one flight… bastards! 
Obviously bardwell has his recommendations
Think 1200 the largest 6S he has listed there!
