harold1946 wrote:
There are Marine deep cycle batteries and there are marine deep cycle/starting batteries. Two different applications.
Have never seen a true Deep Cycle battery with the word MARINE printed on it... Though I can see where there would be an advantage to DEEP CYCLE for many functions on the water.
I have seen true DEEP CYCLE 12 volt batteries in assorted sizes from around Group 27 up to you can't pick it up without a forklift.. But then it also POWERED said forklift.
All the Marine/Deep cycle (usually labeled exactly as I typed it with the slash) are starting batteries which can be SLIGHTLY discharged beyond what you would do with a common car battery.
The other claim I often see that I dispute is the claim of longer life for AGM's.
When I bought this MH, It came with a pair of GC-2 Flooded wet cells, I will be replacing them soon.
The following January I added a pair of AGM's. Replaced them 2 years ago.
I also slepped in some Maintenance Free Marine/Deep cycle types I had lying about, these are OLDER than the GC-2. Those I replaced over teh course of this last summer (2013) The last one last month
So the Maintenance free roughly lasted as long as the GC-2, but both of them long outlasted the far more expensive AGMs.
