1996 mazda mpv

12v, check the guide at the parts store, but any that fits and is over the cranking amps needed for it, side post / top post can be changed over or around / converted to use either. The positive & negative should be bought to be same unless your adding terminal wires too and you can use the extra length to reach. I always measure the space battery is going, see which side of it is positive and if there is enough wire to reach the other side if post were to be opposite and if a top post will fit under the hood if it had side post and if so I buy a top post and use the higher quality top post converters from side post add on terminals or cut the wires and add my own terminals so I get a better battery (cost verses per size by measuring each battery and its configuration and what if anything else I need) will fit then buy the biggest/best battery money can buy that will fit. By the biggest, best but cheaper battery configuration you can all while staying away from the 2-3 year warranty batteries, get the 5 year battery and if doing like I said above it will likely last 7 years.

Do not listen to those saying a larger battery will fry your electrical system or computer or the alternator will not be able to keep it charged up as they simply do not know what they are talking about.