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28.4.3 Battery-related Alarms
The capacity of the battery is limited. When the battery is low, the monitor presents the Low Battery alarm, the
alarm lamp flashes, and the monitor produces an alarm sound.
If the battery is almost depleted, the monitor presents the Critically Low Battery alarm. In this case,
immediately connect the AC mains to power the monitor and charge the battery. Otherwise, the monitor will
automatically shut down soon.
For more information on battery-related alarms, see DAlarm Messages.
28.5 Charging the Battery
The battery is recharged automatically when the monitor is connected to the external power supply.
28.6 Maintaining the Battery
28.6.1 Conditioning the Battery
The performance of batteries deteriorates over time. You should condition the batteries every three months.
If the battery is not conditioned for a prolonged time, its charge indication may not be accurate and you may
wrongly evaluate the remaining battery runtime.
To condition a battery, follow this procedure:
1. Disconnect the equipment from the patient and stop all monitoring and measuring procedures.
2. Allow the battery to be charged uninterruptedly till it is fully charged.
3. Allow the equipment to run on the battery until the battery is completely depleted and the equipment
automatically shuts down.
4. Fully charge the battery again for use or charge it to 40 – 60% for storage.
• Do not use the equipment to monitor the patient during battery conditioning.
• Do not interrupt battery conditioning.
28.6.2 Checking Battery Performance
The performance of a rechargeable battery deteriorates over time. You should check the battery performance
every three months or if you doubt that the battery may fail.
See steps 1 to 3 of 28.6.1Conditioning the Battery to check battery performance. The operating time of the
batteries reflects their performance directly. If the operating time of a battery is noticeably shorter than that
stated in the specifications, the battery may reach its service life or malfunction.If the battery performance
meets the requirement, fully charge the battery again for use or charge it to 40 – 60% for storage.
• Battery operating time depends on equipment configuration and operation. For example, high
display brightness or measuring NIBP repeatedly will shorten the battery operating time.
28.7 Storing Batteries
When storing batteries, make sure that the battery terminals do not come into contact with metallic objects. If
batteries are stored for an extended period of time, place the batteries in a cool place with a partial charge of
40% to 60% capacity.
Condition the stored batteries every three months. For more information, see 28.6.1Conditioning the Battery.
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