car battery charger

Dumb question maybe but how do battery chargees workd,i dont mean how to hook it up,more like how does the needle work,does it go from right to left when charging?If so,this makes no sense for me cuz everything we do we go from left to right.Btw,it's an Einhell battery charger,german product.I'm...

I need to replace a neighbour’s Selmar Turbo 12 battery charger. Ive borrowed it on more than one occasion but I think I’ve burnt it out. I also think it is quite old as I’ve not found another one in any online search. It’s 12 Amp. Can anyone suggest something equivalent I can get? Nb, I wish...