The nominal voltage of normal voltage cells is at 3 6 3 7v while the nominal voltage of high voltage cells is at 3 8v or 3 85v.
High voltage battery.
The problem is these batteries have a low voltage.
Again not to beat the horn too much the ideal voltage range is somewhere between a 12 4 in voltage and 12 7 in energy experts take a gamble around 12 6 in voltage and above.
If your car battery occupies a very high voltage above 12 9 volts it will reach dead status sooner than you expect.
You can make a high voltage battery using electrochemistry.
High voltage cells lithium ion polymer lipo battery cells with normal voltages are fully charged at 4 2v while high voltage cells are at 4 35v.