Passport 12/Passport 8 Operator’s Manual 24-5
24.7 Checking Battery Performance
The performance of a rechargeable battery will deteriorate over time. The battery performance test should be
performed every six months, before monitor repairs, or whenever the battery performance is diminished.
To check the battery performance:
1. Disconnect the monitor from the patient and stop all monitoring and measuring procedures.
2. Turn off the monitor.
3. Apply AC power to the monitor and allow the battery to charge uninterruptedly for 6 hours.
4. Remove AC power and allow the monitor to run from the battery until it shuts off.
5. Record the battery operating time.
The battery operating time directly reflects its performance. If the operating time of a battery is noticeably shorter
than that stated in the specifications, replace the battery or contact the Mindray service personnel.
NOTE
Battery operating time depends on the device configuration and operation. For example, high display
brightness or measuring NIBP repeatedly will shorten the battery operating time.
24.8 Storing a Battery
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, they should be placed in a cool place with a partial charge of 40%
to 60% capacity.
Stored batteries should be conditioned every 6 months. Refer to section 24.6 Conditioning a Battery for details.
NOTE
Remove the battery from the equipment if the equipment is not used for a prolonged period of time (for
example, several weeks). Otherwise the battery may be over discharged and damaged.
Storing batteries at high temperature for an extended period of time will significantly shorten their life
expectancy.
Storing batteries in a cool place will slow the aging process. Ideally the batteries should be stored at 15 °C.
Do not store the batteries in an environment above 60 °C or lower than -20 °C.
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