These batteries are incredible!! The first thing you’ll notice is the weight. 3 of their 60ah batteries weigh less than 1 of the group 31 batteries I was using. The power in these batteries seem to be endless. I’ve used them on everything from small back lakes to the big water of Lake Ontario to fighting the rushing current in the St. Lawrence river. I’m usually on the water for 8–14 hours a day, and I’m pretty heavy on the trolling motor pedal when out prefishing. I’ve never been able to run them dead despite my best effort. I could probably fish for 2-3 days or more on a single charge and not worry about them leaving me stranded. If you only have a few hours between outings, and you want to top off your batteries, that’s not a problem either. Just plug in your charger and within a few short hours your batteries will be full and you're ready to go. Anyone thinking about upgrading their old lead acid or AGM batteries will not be disappointed with Lynac Lithium batteries.