Gens Ace Traxxas Lipo Batteries soft case 50C series for 1/8, 1/10, 1/16 Traxxas Car model, 2200 2s for 1/16 series, such as 1/16 E-Revo,  1/16 Rustler, 1/16 slash etc. 5000 2S, 7600 2S, for most of 1/10 model, such as 1/10 E-Revo, E-Maxx, stampede, bandit,  rustler, slash etc. 5000 3S can fit 1/10 Slash,  E-Revo, TRX-4 etc. 6750 4S for XMAXX 8S, Unlimited Desert Racer.