It should be easy, but... I need new dual on-board battery charger maintainer for my Sabre 28. The old one was about 10 Amps. I'm trying to stay under $120. I tried researching it, but it seems that even "very good" ones have drawbacks. I want a simple charger that will charge and maintain both my batteries without deciding that one of them is "bad" and then shutting off. I do not want a cheap one I will hav eto replace in 2 years. The PO's old one was 20 years old when it conked out. In fact, it was so reliable, that the PO couldn't figure out for 15 minutes why the engingine wouldn't crank untill we realized the charger was bad. So, I will entertain all ideas...