Well I charged them every time I get home. I have to charge them one at a time with the charger I have. One of the batteries is only about 2 months old. The other one came with the boat but he said they were brand new and it looked brand new. They are both Interstate Marine Trolling batteries 27. They are the exact same battery. Maybe the other one was older than I thought... but it worked like a charm for the first 3-4 trips to the water. The last two trips I have only gotten 2 hours of trolling.

I really want to upgrade to a 3 bank 10 amp per bank Minn Kota.... but getting that into the back of a G3 boat is going to be tough. I can barely fit a quart of oil back there... Take a look: