Traxxas EZ-Peak Plus 4S Multi-Chemistry Battery Charger w/Auto iD (4S/8A/75W) [TRA2981] - AMain Hobbies
Traxxas 3070R - 4S Male Connector - ESC Use Only - Hub Hobby
Traxxas ID Power Cell 5000mAh 14.8v 4-Cell 25C LiPo Battery 2889X – Stone Blue Hobbies
Just made my slash 4x4 4s capable and my MAXX is now 6s capable I am super satisfied with these upgrades much more power and more power is more fun! : r/Traxxas