Philips V24CT User's Reference Manual page 361

• A low battery alarm INOP tone will sound and the flashing message
"RECHARGE BATTERIES" will replace the battery gauge.
Remaining monitoring time on the batteries is typically 15 minutes
with new batteries at room temperature, 25°C.
• The
Silence/Reset
• When new batteries are inserted or the monitor is plugged into AC
line power, the low battery condition will be cleared.
• Alarm tones for patient alarms will have higher priority than the low
battery INOP tone.
• The battery fuel gauge will be replaced by the message "AC POWER
ON" when the monitor is plugged into AC.
• When the battery voltage cannot be read because of a hardware or
battery malfunction, the fuel gauge will be replaced by a flashing
message "HARDWARE MALFUNCTION" and an INOP alarm will
sound (even if the alarms are suspended.) The
will silence the tone for 3 minutes. The alarm will reoccur until the
condition is corrected.
Battery Indicator and Messages
key will silence the tone for 3 minutes.
Battery Information (V24CT and V26CT only) 12-7
key
Silence/Reset