** Reply to message from "Bob" <os2-wireless_users@2rosenthals.com> on Thu, 11
Jun 2009 20:48:56 -0700
> I was wanting the specifications for the batteries so I could try to find them
> locally and avoid the shipping charges (can you use car batteries since all
> these batteries are lead acid batteries?). After looking at both web sites the
> shipping charges were not as bad as I had expected. I still can not compare
> the different batteries because there are no specifications about them.
You don't want automotive lead acid - they vent hydrogen and tend to splatter -
every one I've seen has corroded the inside of the enclosure. The vented
hydrogen can also be an unpleasant bomb in a closed area like the inside of
equipment. What you need is a "sealed lead acid" although even that name is
misleading as the majority of those are actually gell (cells with a gelled acid
solution) which makes them spill proof. These are also rated for extended or
trickle charge without damage to the battery - important as nearly all UPS
batteries are seldom discharged compared to the time they spend waiting with
just a trickle charge.
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