LP-7.4V-3800mAh-35C 1.Specifically design for use in R/C Racing Vehicles. 2.Batteries are housed in a durable,crash resistant plastic outer case 3.Instead of the traditional Ni-MH 7.2V Sub-Cand Ni-CD 7.2V Sub-C battery pack. 4.Longer runtime and less weight than traditional Ni-MH and Ni-CD cells. 5.Installed equalizing/balancing port. 35C Constant Discharge (133amps) Hard Outer Case 138mm x 46.8mm x 24mm 7.4 Volts 3800mah Capacity (plenty for racing) 260g Perfect LIPO battery pack for: Associated RC10B4, RC10T4, TC4, TC5. Duratrax Evader BX, Evader BX Pro, Evader ST, Evader EXT. Hot Bodies by HPI Cyclone. HPI E10. Kyosho Lazer ZX-5 Lazer ZX 5,Ultima RB5, Stallion, TF-5, TF 5. Losi XXX-T, XXX-S, Drift-R, Speed-T, Speed T, Desert Truck, 1/10 Slider. Tamiya Sand Viper, Gravel Hound, TXT-1, TXT 1, Durga. Traxxas Stampede VXL, Rustler VXL, Bandit VXL, 4-Tec, Spirit, Slash. Xray T2, T2 R, T2 007. Yokomo MR-4TC.