36 - 4 BeneVision N22/N19 Patient Monitor Operator’s Manual
36.5 Charging the Battery
The battery is recharged automatically when the monitor is connected to AC mains power.
36.6 Maintaining the Battery
36.6.1 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 monitor 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 monitor to run on the battery until the battery is completely depleted and the monitor automat-
ically shuts down.
4. Fully charge the battery again for use or charge it to 40 – 60% for storage.
• Do not use the monitor to monitor the patient during battery conditioning.
• Do not interrupt battery conditioning.
36.6.2 Checking Battery Performance
Life expectancy of a battery depends on how frequent and how long it is used. When properly used, the lithium-
ion battery has a useful life of approximately two years. If improperly used, its life expectancy can be shorten. We
recommend replacing lithium-ion batteries every two years.
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
36.6.1 Conditioning 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. Contact your service personnel.
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.
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