Lipo batteries have a different range of voltages. This is indicated by the “V” on the battery itself. A typical Lipo battery cell will have a nominal (resting) voltage of 3.7 volts. Sitting bang in the middle of its maximum charge of 4.2 volts per cell and the minimum and safe charged rate of 3.0 volts. This is why 7.4 volt batteries are a configuration of 2 cells, ie double the nominal voltage.
The voltage of a battery pack is essentially going to determine how fast your vehicle is going to go or potentially influence the discharge of your Airsoft weapon. Vapextech lipo batteries range from 7.4v to 11.1 volt batteries giving you a wide range of power sources for your chosen use.