Break out Parts all new this vaccume was new, lost cord

Small 12v motor and suction turbine and inlet
The exhaust just blows out the back

These batteries are a disapointment but will have to investagate further.

Ni-MH

The negative electrodes use a hydrogen-absorbing alloy instead of cadmium (nickel–cadmium cell (NiCd).) NiMH batteries can have two to three times the capacity of NiCd batteries of the same size, with significantly higher energy density, although much less than lithium-ion batteries.

this would mean 10 x 1.2 = 12v (I had to use a calculator)