A 3s should be fine. What your really worried about is voltage under load, a lipo will have more usable energy and voltage under load.

I've linked a very long winded article about using lipo vs AGM (gel cell) in marine applications. It maybe more information than needed, but still interesting. https://www.victronenergy.com/blog/2...um-ion-vs-agm/

Another thing with the lipo batteries, you will need to pick up a small voltage reader that plugs into the balance port. That way you can check to make sure your not going below cutoff voltage. I have linked one below that will buzz at cutoff voltage.

https://www.amazon.com/Femitu-Batter...QV2P2YSJ1JMBW5