I got that battery powered vacuum but its no good and in the end i got the plastic shake to start vacuum. Heres a way i start a gravel cleaner without shaking to start it
1) With the gravel cleaner scoop up some water and make the gravel cleaner point up
2)The water will begin to go down the pipe and when its close to emptying the gravel cleaner put it back into the tank water.
This mostly starts my gravel cleaner quickly
If you have plants in you aquarium which rooted down i would move the gravel around with my hand to take the dirt out from the bottom and use the gravel cleaner to take it out