I have 3 of these batteries that I use to service 3 batteries for my boat and garden tractor. I've had all 3 for quite some time and they've been great at keeping my batteries in good condition. What I really like is that they come with wiring for alternate connectivity, built-in fuses, etc. I also like the LED indicator that tells me what's going on at a glance; usually green which shows they are currently in maintenance mode and ready to catch the next big fish :-)