I had a Battery Tender on a '06 Corvette that I don't drive enough to keep the battery charged. It gave out a few month's past the warranty. I replaced it with a cheap appliance timer connected to a battery charger with an auto shut-off. Set it to run about 30-40 min every day. So far this set-up has lasted 5+ years. Ir I need the charger I just disconnect it from the timer.
