I use 6 x 2s 10.000mah.
They fit easely in a eBoosted LY Evo enclosure.
They are wired to 2x 6s balancers. but I will change that to a 12s balancer when it arrives…
Batteries (299 eur for 6 pieces.):
https://www.amazon.de/gp/product/B0B58XR4V2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
BMS (25 eur):
https://de.aliexpress.com/item/4001170222603.html?spm=a2g0o.order_list.order_list_main.19.34d65c5f2lyz4A&gatewayAdapt=glo2deu
It works perfectly well for me. Lots of power, so I can test the limits of my vesc and motors.
Did not test the range, but it should be 500wh calculated.