Carisma GTB - Sutible Batteries & battery tray size

[MattV6]

Hi guys i'm after a bit of info

I'm currently running a Losi mini 8 and although i think it drives very well ive just bought myself a Carisma GTB after racing against them at Torbay at the weekend, they just seem an overall better car.

My question is what are the batteries that are being used? All my other electrics are being swapped over but i would like to make this a competitive car as best i can. I'm currently running some 1300 Gens Ace packs, good but very short.

Whats the battery tray length? My kit will be here tomorrow but i would ideally like to order a few batteries today/tonight so i've got them for our race night on Thursday . I'm in the Micro nationals and would love to get it as competitive as poss

Would these fit in?

https://www.hobbyking.com/hobbyking/...dProduct=26653

Any advice would be very helpful