I would also recommend the NOCO 4 bank lithium / AGM charger. You can set each bank for Lithium or various types (AGM, etc.) of batteries. Been using one for several months with no issues. I put 3 Lithium batteries in my 2011 PUMA, turned them on their side to get 2 to fit in the space of one on the battery tray. Batteries are banded together as lithium batteries work at any angle.
PS If you are thinking of going Lithium I added a “Cable Alarm” cable lock for the rear lid. If the cable is cut or otherwise damaged, the alarm sounds. Easy to install and worth it to protect over $1,000 in batteries from theft.
