832 power trouble - low batt. error again.

["Impalpable" <spdb66@xxxxxxxxxx>]

 have a power 832 system that I worked on a eight months ago.  The
system worked fine for 3 months then gave a low battery error
continuously.  I changed the battery thinking the battery might have
gone bad (old battery).  That didn't solve the problem.  I had heard
of the bridge going bad on 832's and giving that error falsely.  I
had them order a new board and I replaced it yesterday.  The error went

away. Today I checked in to make sure everything was good and the
trouble light was on again.  I checked it and sure enough it said
"Low Battery".  I have tried two batteries and two boards now.  The
non-profit that I am helping with this can't really afford to keep
buying parts.  Anyone know what might be causing this mess?  They have
a dial in module, printer module, and autodialer all on the system.
Might the devices be drawing too much power from the system ?  Someone
recommended a bigger battery, but I wouldn't think that would solve it
since the power is not going out.  This happens when the system is
plugged in and no power event have occured.  Thanks all.