[warphotographer]

hi! newbie here. while cleaning the storage today, i found box and written there is 12 volt 12 amp battery charger. whan i checked it out i saw this big heavy charger. while inspecting it, i saw some switches with 12v and 6v and the other switch says fast and slow. so it's pretty clear that this is a 12 volt battery charger. my question is, can i use it to charge an 8.4volt or a 9.6 volt battery? sorry if this sounds stupid but i just want to make sure about this.

thanks in advance
WP