For example Toyota Prius uses 274-volt nickel-metal hydride (Ni-MH) batteries, the same type (Ni-MH) are used in Lexus vehicles (it's under toyota). Toyota also plans to switch to Li-Ion batteries in later models, as they have better power-to-weight ratio.

But hybrid train powerplants use also heavy duty lead acid (Pba) batteries, because they last long without degradation.