John,
BEST BANG FOR THE BUCK .....In my opinion is a "BATTERY TENDER" for your toys, camper,tractor,mower etc.
Over the yrs I also just accepted the fact that in the spring somethin would have a dead battery until I got my Bass boat with its on board chargers ...heck the batts last forever! as long as ya service the fluid level with distilled water.
So over the last few yrs I purchsed Battery Tenders for ALL my stuff from my Motorcycles to mowers and my 52 ...and I havent bought a battery in a many yrs.
I have a 2 bank on the wall that takes care of the bikes, and singles for my mower and 52 ...when I am done with any of them for any length of time I just plug em in ...an WHALLA they are always good to go.
Taking care of the batts in your toys and home maintainers is the BEST BANG you will ever get.
just my 2 pennies.
Tim
P.S. I buy Exide batts. good bud has a battery store and I buy local.