bluebonnet Posted October 11, 2018 Share Posted October 11, 2018 Don't use my truck very often during the winter months. It has four 6 volt batteries. negative ground. Is it possible to attach battery tender, if so would like some instructions on how to do it. I start the truck through out the winter using the block heater. Victor Quote Link to comment Share on other sites More sharing options...
j hancock Posted October 12, 2018 Share Posted October 12, 2018 Are the batteries wired together to make (2) 12 volt batteries? If so, connect the 12 volt Tender to charge the two batteries together. After a couple of weeks switch to the other set of 2 or buy a second Tender. Tender makes a 6 volt version if you want to maintain separately. Tenders work well and you can check out their connections info on the link. https://www.batterytender.com/Connecting-Chargers 1 Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
bluebonnet Posted October 12, 2018 Author Share Posted October 12, 2018 Thanks, will get another tender for the other side. this is very good information. Victor Quote Link to comment Share on other sites More sharing options...
eddeere Posted October 14, 2018 Share Posted October 14, 2018 I have used one for years on tractors, trucks, land mowers , and anything , that has a 12 volt battery . I just switch them to something else when they show a full charge . Quote Link to comment Share on other sites More sharing options...
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