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True, it won't normally discharge just by placing it on the floor due to the plastic insulation. I can understand how you could interpret my post as "putting a battery on the floor grounds it and thus discharges it"... but, that's not what I said. I was referring more to the temperature of a cold concrete floor. Have you ever felt a concrete floor? Usually it is a lot colder than the ambient air temperature, and definitely much colder than other types of flooring (carpeting, wood, etc.). Here's some info from a battery FAQ I dug up...
"Actual battery storage capacity usually stated in amp hours, depends on temperature. The colder the batteries the less storage capacity available. At 50 degrees F storage capacity is reduced by about 15%. At 32 degrees F storage capacity is reduced by about 30%. Also the voltage necessary to charge batteries increases as they become colder."
So, you say put a piece of wood btwn the bat and the floor, what's the difference btwn wood and the plastic case? None, they are both insulators.
So, the reason people place a piece of wood underneath a battery on a concrete floor is to provide additional insulation from the colder temperatures... it's much more insulation than just the plastic of the battery alone. Lastly, you can ask Ben (Miami) how fast his almost new battery died when we left it on the concrete floor of my garage for a few weeks.
Bernie
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Datalogs every run... launches with boost in your 5-speed... keeps turbos spooled between shifts... enables controlled power slides! For more information, pricing, or to purchase a system,
feel free to e-mail me: bhsiao@newssun.med.miami.edu
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