Name:   Lifer - Subject:   Battery Maintainers..Good or Bad?? Date:   5/16/2017 10:45:45 PM

  I would not use one that does am"continuos" charge as some do. They are the ones that will boil a battery. The best one I've ever used had timer and would put a full load on the battery for 15 minutes every 21 hours. Why 21 and not 24 I never figured out but it never failed to maintain a battery. Unfortunately I can't remember the brand and I let it go with the big boat last year because I had mounted it in the engine compare the. The on board one came with the boat failed to maintain a battery one winter so I quit using it. I miss that one.