TRAXXAS X-MAXX 3D PRINTED ABS BATTERY TRAY - LARGE
Biggest batteries I've found to fit in the stock XRT battery tray are these HRB 9500mah 4s 120c packs. The Lectron pro 5200's the hobby sold me are way too small. These
How to buy a battery pack for your Traxxas vehicle | EuroRC.com
Traxxas EZ-PEAK LIVE 2971 Charger with (2) 14.8v 4S 2890x Batteries X-MAXX 20334299307 | eBay
Gens ace 11.1V 45C 3S 1300mAh Lipo Battery Pack with EC3 and Deans adapter for Xmaxx 8S Car – Flex RC