Walmart Battery Comparison
Roughly 5 years ago I installed three 12V Marine batteries that I purchased from Walmart. I can fit a maximum of 3 batteries on board, so I decided to go with 3 12V batteries instead of 2 6V batteries...
Forum Discussion
Eric212 wrote:Ed_Gee wrote:
I can't offer you any opinion on which you should get, but I want to point out the rather devious marketing ploy they are using by providing Amp Hour specs at a measly 1amp draw. The Industry standard specification is a 20A draw. I suspect that for a 20A draw neither of these batteries would be rated at even 100 AH. Also makes it hard to compare to the other quality vendors who do rate their batteries at the 20A spec.
1 Amp draw for 1 hour = 1AH no?
Yes, Eric. But my point is the capacity of a battery is not linear. You may be able to draw 1 amp for 114 hours on that battery but you cannot expect to draw 10 amps for 11.4 hours. It won't last that long. The more current you pull from a battery, the faster it depletes....and as I said, it is not a linear rate. That is why most batteries are rated at a standard 20 amp draw, which is much more realistic in motor homes and trailers.
