I really hate to promote Chinese knock-offs, but you can't argue with performance and value... the absolute best charger/maintainer I've found is https://www.amazon.com/FOXSUR-Intelligent-Automatic-Maintainer-Batteries-Blue/dp/B088QCXNMY/
why do I like it? It holds 13.6V even with a modest load. and it's 8A, so it's got some power. but the 13.6V float charging is the real advantage. I've now got 8 of these units and use them on all my vehicles, lawn tractors, backup power systems, etc.
why do I like it? It holds 13.6V even with a modest load. and it's 8A, so it's got some power. but the 13.6V float charging is the real advantage. I've now got 8 of these units and use them on all my vehicles, lawn tractors, backup power systems, etc.