Harvey51 wrote:
My Costco "Deep Cycle" batteries have performed well for 4 years now. I have been careful to avoid discharging below half. They say "deep cycle" on the side. What can one do to find out if they are truly deep cycle?
Perhaps the easiest is to find the weight of your batteries and compare that to a well known Mfg of deep cycle batteries in the same group size. The amount of lead (weight)in the battery is a dead giveaway as a true deep cycle will have bigger plates.
Trojan sells a wide variety of deep cycle batteries and publishes the weights, along with the other specifications.