DSC PC5010 Battery Low Error

["mikee" <jettset@xxxxxxx>]

I have been stumped on this for a long time.  A while back, my keypad
gave me an error message, battery low.  I had changed my battery for a
new one and the error went away.  Exactly 1 week later the error
message came back up.  I checked the battery, and it was down to 10
volts.   Not soon afterwards my board went bad.  I had my alarm
installer replace my board with a new one.  I had hooked up my battery
to a battery charger that I had and charged it back up to 13 volts.  I
placed the battery back in the cabinet,  again exactly one week later I
had the low battery light come on again.  At that point, I thought my
transformer might be on the blink, so I bought a new DSC transformer.
I had taken the battery out again and recharged it on a battery charger
again.  I put it back in. again exactly one week later the low battery
light came on again.  I thought at this point that my battery may have
been screwed up from charging it on a seperate battery charging unit,
I went ahead and bought a new battery again.   I now have a new PC5010
board, a new transformer, and a new battery,  one week later the
battery low error popped up again!!,  I checked the VAC on the leds
coming from the PC5010 board and I get about 13.5 volts.  I checked the
battery itself and I get 10 volts, I connect the leads to the battery,
and I get a total of 10 volts.

What the hell is going on here?  why can't I get this damm thing
charged??  please help!!