I have the lister laser 12 volt shears that go straight onto a 12 volt car battery.
I dont recommend it
I have very small hands and the hand set weighs 1.2 kilo, gets very heavy halfway through my sheep, also as its so heavy and cumbersome and my hand doesnt fit around the hand piece, it half fell out of my hand 2 days ago when dagging a ewe lamb and caught the palm of my hand at the base of my thumb.
a perfect "V" shape slice, right down to the bone, bled for ages and ages and my thumb now clicks when I move it
I am now really put off shearing 25+ sheep this summer with it
not sure what to do