A&D TM-2430 Instruction Manual page 6

automatic measurement condition data. The period varies depending on the battery condition.
The backup battery may take 24 hours or more to be fully charged
(depending on the battery condition).
The built-in backup battery (rechargeable) as well as the primary battery (not
rechargeable) will deteriorate along use, which causes to decrease its capacity. The
built-in backup battery will deteriorate due to repetitive backup operations.
To prevent the sudden drop of the built-in battery life, observe the following:
Before using the monitor for the first time after purchase or after an extended period of
no use, charge the battery fully. It takes 24 hours or more with the power switch
turned on. Charging can be performed during measurement.
After measurement, leave the battery inside and the power switch turned on. Under
this condition, the built-in battery will not deteriorate. (This is true with the "B" sign
displayed.)
When the monitor is not to be used for a month or longer, turn the power switch off to
prevent the main batteries from leaking. During an extended period of no use, the
built-in battery will deteriorate. To prevent the situation, use the monitor regularly.
When the power switch is turned on and off after a short period of use, the built-in
battery will not be fully charged and the battery life will decrease. Avoid this situation.
Cuff
Close the cuff fastener properly when attaching the cuff to a patient or
replacing the cuff cloth. If the fastener is closed incorrectly, inflating cuff may
damage this cuff.
The cuff contains dry natural rubber.
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