Prophecy is a tough business, Josh. Do these batteries have measurable OCVs=
?

   Jack

> On Jan 8, 2014, at 4:11 PM, Josh Koffman <joshybear@gmail.com> wrote:
>=20
> Hi all,
>=20
> I have a couple of 12V 7Ah gel cell batteries. They've been sitting
> for probably about 3 years. Any thoughts on if they'd still be good? I
> need to power a 12V 4A load for about 20 minutes at a time.
>=20
> I'm considering using these and not a different technology because:
> a) I already have them, and this is a favour for someone, so the cost is =
my own.
> b) I can order a charger for them from Digikey for fairly cheap
> (http://www.digikey.ca/product-detail/en/BA500120500003NK/271-2382-ND/124=
5112)
>=20
> If these were new, it'd be a slam dunk. Since they're not, I am not
> sure if they will work or not. I know I could try charging them
> carefully with a bench PSU, but I'd like to avoid that if possible.
> I'm just looking for the probability that they'll work at all for my
> intended application.
>=20
> I should note that I only plan on using one of the units at a time,
> not a parallel setup.
>=20
> Thanks!
>=20
> Josh
> --=20
> A common mistake that people make when trying to design something
> completely foolproof is to underestimate the ingenuity of complete
> fools.
>        -Douglas Adams
> --=20
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.