>The first round of ventless batteries were known as gel cells. These have
>mostly been replaced by RG batteries now with some still being available.
>
Both RG and Gel batteries are vented in that there is a cap designed
to release at 1 to 2 psi of overpressure inside the cell. This is
necessary to prevent bursting in the event of an severe overcharge.
Paul is correct in that for normal operation, these batteries are
closed off to the exchange of gasses and moisture with the atmosphere
and are often referred to as "sealed". But you'll also see the acronymn
"SVLA" used in conjuntion with modern batteries . . . this translates to
"sealed, vented lead-acid" . . .
If anyone is interested the very latest and greatest of battery
developments is invited to check out:
http://www.boldertmf.com
If you have dual alternators (full electric panel and one alternator
running vacuum pump pad) and two of these three-pound batteries to
crank engine and stabilize alternator, it's now possible to have an
electrical system (starter, batteries, AND alternators) whos total
weight is LESS than the 24 a.h. battery that most people fly in their
airplanes with an order of magnitude higher flight system reliability.
I love this business!!!!
Bob . . .
////
(o o)
< Independence Kansas: the >
< Jurassic Park of aviation. >
< Your source for brand new >
< 40 year old airplanes. >
http://www.aeroelectric.com
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