My DSC 9047 alarm panel showed a low device battery warning. So I decided to replace all of the batteries in the door sensors, motion detectors and the DSC SCW panel battery too. Finally the warning went away and I got a green light... but only for a few hours. Then the low device battery warning came back on. What could be wrong?

Home Security - DSC - SCW-BATTERY - Replacement Battery for PowerSeries 9047