NOCO here. I bought a few extra harnesses with eyelets so I can leave them on trucks and things that are not as handy to get alligator clips on. All the maintainers I have use the same disconnect so I can easily hook them up without having to remove battery covers. I did recently have a 5 amp one fail it seems (does nothing when I plug it in and connect it to a battery), but other than that, I’ve had good luck with them. Starting to see them ay several stores (Acme Tools, Walmart, Amazon)