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Lead acid batteries actually last longer if they are gently used. (50% discharge or less) Since an un-cycled battery may require replacing every few years anyway, why not get a deep cycle one for a little more money that will last 3 to 4 times as long. (yellow top Optima)
Nerys, You should always keep lead acid batteries fully charged. Even leaving one even partially discharged overnight is not a good idea. Sulfation happens quickly and permanently damages the battery. There are ways to desulfate but they require a special device and do not restore batteries completely if at all.
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Vortex generators are old tech. My new and improved vortex alternators are unstoppable.
"It’s easy to explain how rockets work but explaining the aerodynamics of a wing takes a rocket scientist.
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