"Darryl Ramm" wrote in message
...
(a common cause of death of VRLA batteries by evaporating the
electrolyte out the vent valves)

Amen! More glider batteries are ruined by over charging and any other cause.
If you tend to connect your battery to a charger and then forget it until days
later (isn't that most of us?) then you need a float-type multi-stage automatic
charger. I am sure that there are many in the RC world, but I like the products
of this company. http://batterytender.com/

Vaughn