The battery powering the ARISSat-1 space craft is failing rapidly. The satellite experienced a RESET during an eclipse period (i.e. MET reset to 0). Once a reset occurs the 15 minute delay timers start. At the end of that delay the battery voltage is sampled to determine whether to go into Low Power, High Power or Emergency Power. Tony Monterio, AA2TX has a excellent description of the power system in the Jan/Feb 2011 issue of the AMSAT Journal. See the PDF link
Here is the latest battery graph provided by Kenneth Ransom, N5VHO. The red line at 32.5V is the minimum voltage to sustain High Power operation of the satellite.