I have a 24v Minn Kota Rip tide trolling motor. This is being charged by dual bank charger. One bank (battery) is bad. I have two other batteries that provide cranking and all other accessories (second charger on these). These chargers are 7 years old. Thinking about replacing with Minn Kota 220 Dual bank chargers and Optima blue top marine batteries. Any experience w the Minn Kota chargers and Optima batteries?