I have had 3 100 amp Ionics for now alittle over 4 yrs. No issues and love them. Bbc forum,,,I have never seen a reported boat fire caused by lithiums…if one or 2 due to wiring issues but not the battery. Blue toothed phone apps are unbeatable but lots of cheap battery meters available. I also have a 50 amp and 30 Ionic for different uses at home. I also use NOCO chargers..a 2 bank 20 amp and single bank 10 amp. If your worried about running your lithium starting battery down..get a portable jump starter..can be had for a 100 bucks or so. Once you use lithiums….you will never go back to wet cells.