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#7
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Speaking of sulfated batteries, I've had really good
luck with these high frequency pulse chargers and have been able to "revive" several batteries I thought were ruined. http://www.pulsetech.com There are several subsequent patents on this technique and various implementations, but an earlry one, if not the orginal one, was patent #5,491,399, Gregory et al. I found a Pulsetech model at a local Batterys Plus retail store. They have both transformer and solar panel powered versions. Works great for long term maintenance of the battery. "Ron Rosenfeld" wrote in message ... On Mon, 12 Jan 2004 09:05:49 -0800, Jim Weir wrote: Respectfully disagree. You take an OLD 25/35 ah aircraft battery and float it at 13.4 for a week or so and it will burp acid. New ones will not, old ones will. Been there, done that. What are you disagreeing with? As I pointed out in my message, the float voltage for a particular battery will vary from one manufacturer to another. I was careful to state that the numbers were for *my* batteries, but proper float voltage should be obtainable from the various manufacturers. And if the battery is old, it probably is partially sulfated and, if so, should be equalized at a low current before putting it on float. If you can't obtain the proper float voltage from the manufacturer, it can be determined empirically by looking for bubbles in the electrolyte after it's been charging for a while. But the concept that Concorde says works for their gas recombinant batteries, of repeated discharges and recharges, is not one that should be generalized to all batteries. A steady float will likely be better for a FLA battery. Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA) |
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