I was using a ProMariner 20 amp 2 bank charger for charging wet cells..Reset it to charge AGM batteries and it charges my Lithiums to 100 percent. Charging each battery at 10 amps takes a couple of hours when at 60-70% to 100%. With lithiums,,you do not have to charge them to 100% if you don’t want to. Sometimes after 2 days of running trolling motor,,I may be down to 45-50% used. I also use a 1 bank NOCO lithium battery only charger for the 100 amp electronics and to run/start my 25 electric start motor. It only drops about 20 percent per day usage as I don’t run long distances with motor to charge it a lot. Electronics on boat are a 9 MSI g2n, 10 MDI g3n, 12 MDI G4N, mega 360, network, gps puc, trim tilt plate, 25 motor, lights in boat and builge pump. I don’t have a live well as use cooler for fish. I also plug in phone and iPad most days. A lot of wet cell chargers that have a AGM setting on them will charge certain lithiums, you just have to check with the manufacturers of them. You can also use a 20 amp, 30 amp charger per bank in lithiums to speed up charging times. I could have gotten cheaper batteries from Amped but wanted the phone app that Ionic has Bluetoothed into their batteries. It gives me total info including hours/minutes left in them while using, how many amps I am pulling or charging, how many hrs/minutes left to charge when charging. Monitors each cell constantly, also gives battery tempature and voltage your charging at as well as volts your pulling at while everything turned on and a,bit,of other info also. Right now,,I think due to manufacturing issues due to Covid 19,,and demand,,,battery prices are not dropping and remaining constant. Look for deals and discounts in buying batteries. Also,,lots of chargers being manufacturerered today and more being considered and made as time progresses at all price ranges. One other thing about lithiums,,no liquid in them,,so if needed,,you can mount them on their side, upside down, or stacked on each other. These new lithiums now have improved BMS management system installed in them to prevent over heating, fire, and over charging as well as are managing the output in a constant voaltage and will automatically shut down the battery or charging. One other thing about a batteries BMS system. If using a 12 volt trolling motor, you can hook a 100 amp battery, a 50 amp battery, a 30 amp battery in parallel,,,and the bms will equally charge all at the same time as well as you can use them on a trolling motor at the same time and for example,,the 30 amp will last as long as the 100 amp hooked in parallel. Same if I hooked a 50 amp in parallel to a 30 amp for electronics giving me 80 amps to run electronics as the BMS systems works to equal out the used amps when using or charging. I may be using 2 amps of the 50 while only pulling 0.5 amps out of the 30 keeping each battery equal in the amount of power left in each. I have been experimenting using different battery sizes in finding this info out and discussing this with Ionic and it works as well as they confirmed this prior to my experimentation so the combinations are unlimited when in parallel. If buying a 24 volt or 36 volt lithium,,,you will need a 24 volt or 36 volt charger.

if you call some of these manufacturers and sellers,,they can pretty much tell you what you can get away with as far as size of battery. If your a heavy user of trolling motor,,then go bigger,,,some manufacturers only make 20, 30, 50, 100, and 125 amp. Some make 60 amp and 80 amp. Some make 60, 80, 100, and 125 amp starting batteries also. I think Battle Born and Ionic also make a lithium battery that has a built in heater for the guys that fish in below freezing temps. There a bunch of combinations. Also,,check out bbc forum in their Electronics/Trolling Motor forum section..and go back a few pages scouting to the many different questions and answers on lithium batteries that users are asking. Electrical/Wiring/Trolling Motors