swimmer_spe wrote:
At Walmart they have several deep cell batteries labeled as "Marine Starting", and some that are just labeled as "Marine". Anyone know if the once that don't say Starting are actual deep cell batteries?
Definition time
Normal Starting: Designed for high current for brief periods. Should be kept 80-90% full for best life. Rated in both Cranking and COLD CRANKING amps (Zero degrees F)
MARINE: Like above but only raded in Cranking amps (NOT CCA) 32 degrees and above
MARINE/deep cycle and MARINE/rv.. Like Marine but you can take 'em down a but more state of charge.. Say 75%, before they start to age swiftly.
DEEP CYCLE (Like GC or Golf car, batteries) Designed to deliver fewer peak amps (Relative to total capacity) but for much longer times. Can go down to half full before rapid aging sets in.
SO.. the starting battery on my Class a is 78 Amp hours and can deliver 100-200 amps or more for a BRIEF (30 seconds) period. That's about 2 1/2 times their "Amp hours" in amps.
The HOUSE batterie are DEEP CYCLE and can also deliver 200 amps for a period of time.. but this is a fraction of their 230 amp hour capacity. See what I mean by "Relative".