Quote Originally Posted by Bulls Bay View Post
I personally never use GEL or AGM batteries such as the Optimas for deep cycle use such as trolling......The problem with these is that you cannot recharge at a rate more than about 10 amps without damaging the battery...
Charging produces Hydrogen Sulphide gas as the battery charges.........Charging at a high rate in Gel type batteries causes gas bubbles in the gel which causes cell degradation and failure over time........

If you are running Optimas or any other Gel or AGM charge them slow!
I don't reccomend charging any deep cycle over 10amps.