Ryobi Riding Mower RM480Ex Battery Degradation test.

This is our third mowing season for the Ryobi riding mower. It has 52 hours of running time now, we brought it used with 3 hours on the mower. It has worked well for us so far. The Battery degradation is between 11-21% for the four 100amp 12Volt Gel batteries. When I have to replace these batteries, will probably replace them with LFP (Lithium Iron Phosphate) batteries. Right now the least expensive 100 amp 12Volt LFP batteries are $459.00 per battery.