I'm very happy with my Schumacher SC1319. Affordable, simple, and reliable. I use it to keep three random used car batteries I have at home charged up in case of power outage so I can use my large pure sine wave inverter to power my appliances, networking equipment, etc. I have a cheapo 410W Schumacher inverter I bought at Walmart like 5 years ago and I've used it pretty much daily since across various cars and although I did replace the noisy stock fan with a silent Noctua fan it still works great to this day. So Schumacher makes good products! I honestly laugh at anyone who spends $100+ on a battery maintainer when a unit 1/3 of the price will work the same.