Manny of us use this type of battery-
https://www.ebay.com/itm/222528177276?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=FmWitaJLQCa&sssrc=2047675&ssuid=_-YLkpExSsW&widget_ver=artemis&media=COPY
Tubs.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.