This means the internal battery is charging. Series 9x7 machines have a memory battery backup that allows the HP 3000 to recover from a brief power failure. It is one of the things that used to differentiate the HP 3000 from all other systems. Now you have to have a UPS for the 9x8 and 9x9 systems to protect against power failures.

The console status messages should go away once the battery completes charging.