The Hexfly lineup of LiPo (Lithium Polymer) batteries are built strong with aheavy duty hard case & heavy gauge wiring. LiPo batteries offer much improvedperformance than NiCD or NiMH batteries as long as your vehicle is compatiblewith LiPo batteries. Please check your vehicle manual to make sure yourvehicles ESC can accept LiPo batteries and the ESC must have a LiPo cutoff.LiPo batteries must be charged with LiPo compatible chargers. Lithium Polymerbatteries are hazardous and may catch fire, cause damage to your vehicle orother if you do not strictly follow the instructions for handling andcharging. Please read your vehicle documentation before purchasing and abideby all warning labels. Hexfly offers LiPo batteries from 3000mAh on up with"C" ratings starting at 20C. Check out all Hexfly offerings and double checkthe battery size to make sure it will fit securely in your vehicle.