Finally listened to you all and got a cheap charger at Walmart, 6A charge maintainer, microprocessor controlled, 72W 6amp fast charge 4A medium and 2amp slow 6V/12V automatic. Hooked it up and let it sit over night. In the AM the remote unlock didnt work so I knew it wasnt charged. Looked at the charger and it said full charge. I unplugged it and tried to start it, dead. Reconnected, put back to fast charge, it started...the fan revved higher and higher then shut off. I unplugged and reset, put on slow charge, fan stayed low reve so I left it for 2 hours. Came back, said full charge, but was dead. Gonna take the cheapie back today
I have had one for my trolling battery, works flawless for the last 6 months. Just be sure to read instruction book to fully understand maintainer mode and slow charge modes.
pulled all three batts and brought them in, charger is on the starter batt, it kicks in for a few mins, then off for a few, I'll keep checking with the DMM...hope I'm getting somewhere!