Battery is for karts / small recreational vehicles.
Looks like this:
12V 7.5 AH Battery
Other info:
5 7/8" long x 3 3/4" tall x 2 1/2" deep.
Both terminals are 3/16" push-on spade type
Terminals are located at one end of the battery.
External Starter

If you have either or both of these items and can lend them to me for a day, I’d appreciate it. PM me or reply here. Thanks.