24-4 Passport 12/Passport 8 Operator’s Manual
24.6 Conditioning a Battery
The performance of rechargeable batteries may deteriorate over time. If a battery is not conditioned for a prolonged
time, its charge indication may not be accurate and you may wrongly evaluate the remaining battery runtime.
Keeping the battery continuously fully charged without conditioning will speed up battery aging and shorten its life
time. You should condition a battery every three months, before it is used for the first time, or when its run time
becomes noticeably shorter.
A battery conditioning cycle is one uninterrupted charge of the battery, followed by an uninterrupted battery
discharge and charge.
NOTE
The battery charge level indicator does not indicate the capacity or operating time of the battery. It only
indicates the current battery charge level. The actual battery capacity decreases over time with the use of
the battery. For an old battery, its capacity and operating time may not fulfill battery specifications even if
the battery charge level indicates the battery is in full charge. Please replace the battery if its operating time
is significantly lower than the specified time.
To condition a battery:
1. Disconnect the monitor from the patient and stop all monitoring and measuring procedures.
2. Insert the battery to be conditioned in the monitor battery slots. For Passport 8, you need to turn it off before
performing this step.
3. Apply AC power to the monitor and allow the battery to charge uninterruptedly for 10 hours.
4. Remove AC power and allow the monitor to run from the battery until it shuts off.
5. Apply AC power again to the monitor and allow the battery to charge uninterruptedly for 10 hours.
6. This battery is now conditioned and the monitor can be returned to service.
CAUTION
Do not use the monitor to monitor the patient during battery conditioning.
NOTE
Do not interrupt battery conditioning.
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