On Mar 9, 8:48 am, Ron Hardin wrote:
I have 4 replaced 12v UPS batteries, that might be handy for other
things if I keep them charged. What sort of current should go into
them? I think they're 9AH wnen new, so not automotive class.

One of them says ``constant voltage charge 13.6-13.8v'' but I'm
not sure what that means, operationally.

Lead acid, sealed.
--
Ron Hardin


On the internet, nobody knows you're a jerk.

RH,

If - you are talking about 12 Volt 9 Amp Hours Lead Acid
Rechargeable Batterys like these :
http://cgi.ebay.com/_W0QQitemZ270097756280
http://cgi.ebay.com/_W0QQitemZ110101108787
Or - 12 Volt 5 Amp Hour Sealed Lead Acid Battery
{12V 5AH SLA} Rechargeable Batterys like these :
http://cgi.ebay.com/_W0QQitemZ280083262484
http://cgi.ebay.com/_W0QQitemZ200046925738

Then one of these 12 Volt "Float" Battery Chagers
rated at 13.5-13.8 Volts DC Output will work OK.
http://cgi.ebay.com/_W0QQitemZ200087502028
http://cgi.ebay.com/_W0QQitemZ220088839842

hope this helps ~ RHF