Looks like I am soon to be in the battery purchase mode. I have been running two marine everstarts for my trolling motor and one delco automotive battery for my start. I had purchased a three bank 5 amp charger that worked well for maybe 20 months. It is now not working. I think I overlooked checking the water level often enough, ran one or two too dry and shorted out the charger. Seems like the internal protection should have prevented that but anyway. Using a garage charger they do boil but when checking with a volt meter I never get above 12.1-12.3 volts. Full charge should be something like 12.7?. I haven't done a load test yet but feel these are shot. The cranking battery doesn't show any volts so I believe it has a internal breakdown preventing any voltage. Questions: Are the spiral cell/gell batteries worth it? Looking for someone who has had one for several years. What about remanufactured batteries? Any other opinions on this? Thanks for any replies.