Need new Battery Charger, which one?

For my trolling motor batteries. My 11 year old Dual Pro has kicked the bucket. Thinking a Guest. Any particulare model or other recommendations? The dual pro came with my boat and is unbelievably heavy. Their new ones over 300 bucks and that ain’t gonna happen

Looking for a one that will last a long time and care well for my batteries. Doing this quickly is not important. I don’t tournament fish