What 6s battery for 1550 kv ?
 

I used to have Neu 4S 25C 5000mah lipo for Neu 2200kv motor.
Now I switched to Tekin 1550kv motor but I am not sure what rating will be suffice.
Will Hyperion 6s 35c 3300mah be enough or any better suggestions?
Thank you.

No reason it shouldn't work unless that motor pulls over 115 amps constant.

Depends what runtime you want...

Theoretically, if you gear it for the same speed, you should need less current rating with a higher voltage setup. Sounds like you'll be fine unless you're gearing for insane speed runs.

I have that exact battery powering the tekin 1900 kv motor which draws 2/3 to 3/4 the current as my 2650 on 4s (eagletree tested). I couldn't be happier about the performance and temps of the setup.

Thank you all guys. I use exactly the same gearing as my 4s setup.
I want the batteries feel comfortable with the setup.
I was think about 4200mah but it is heavier than 3300mah.
In addition to all your advice, I think 3300mah should be OK.