Matt Mc_Carthy wrote in a message to Alan Hess:

 MMC> 03 Nov 2004, 13:26, Alan Hess (1:261/1000), wrote to all:

 MMC> Hi Alan.

 AH> Does anyone know what type of batteries an APC Back UPS requires, 
 AH> and a source for them?  Seems my UPS is due for a battery 
 AH> replacement.

 MMC> You'll have to look at the battery to see the numbers on it.  Most
 MMC> common one is the 12V7AH, although some of the higher rated ones
 MMC> use the 12V8AH.  Several of the dead APC brands I have here use
 MMC> two 12V7AH or a single 12V14AH. 

 MMC> Best price I've found for many at:

 MMC> www.ragebattery.com/power_sonic_sealed_lead_acid.html

 MMC> Most of the newer APC units have a convenient trapdoor on the
 MMC> bottom for battery access and removal, hope yours is one of those.
 MMC> Old units like I have take almost an hour to get to the battery,
 MMC> and it is pretty dangerous working around the circuit boards
 MMC> before you can get to the battery to disconnect the power leads.  

 MMC> If your model requires disassembly, aim for the battery leads
 MMC> FIRST.  Until they are disconnected, all circuits may be live! 
 MMC> When replacing the battery, the power leads are the LAST item to
 MMC> be connected, after which you can't touch anything but the case
 MMC> and frame.

Good advice, though I would add to it just a bit.    If the unit
is old enough,  there may be some difference between the marked battery
capacity and those of the new ones,  so a set of good measurements is also
in order.

And,  there's not that much difference between brands,  though I too tended
to like the Powersonic brand,  and have had good luck with them.  A given
AH capacity and terminal configuration for a given physical size seems to
be pretty much of a standard in the industry these days.

Shipping is going to be a factor.

---