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OVER DISCHARGED BATTERY RECOVERY
Description Of Recovery
If an Intelligent Battery has discharged to a very low level, the internal
microprocessor of the battery will not operate and there will be no
communication with the PowerBook or the PowerCenter. If communi-
cation is not established when a battery is inserted, the PowerCenter
first attempts to reset the battery microprocessor. If the reset attempt
fails, the PowerCenter applies charge current for a controlled period to
safely increase the battery voltage to a level that will establish commu-
nication. This sequence of operations is automatic and safely applies
more current in less time than the recovery process based on swap-
ping batteries in the PowerBook as suggested by Apple.
This ‘Recovery’ operation requires up to three minutes to complete. If
the recovery sequence is successful, communication with the battery is
established and the normal diagnostics tests are run. If communication
is not established, an E1 error code is displayed.
Od Recovery Operation
• Apply power to the PowerCenter from one of the recommended
power sources.
• Insert an Intelligent Battery into the PowerCenter.
• If there is no communication between the battery and the
PowerCenter and no communication occurs after application of a
processor reset signal.
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The Over Discharge test and recovery sequence begins.
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The LCD displays ‘Od’ to show that the Over Discharge
recovery procedure is in progress.
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The charge and run LEDs blink to alert the user to the activity in
progress.
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The Od recovery activity continues for up to three minutes.
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The PowerCenter attempts to communicate with the battery.
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If no communication is obtained, the LCD displays error code E1.
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The user should remove the battery from the PowerCenter and
label it as failed. Return defective batteries to Apple, your dealer
or other authorized collection points for recycling or disposal.
• If the Over Discharge recovery sequence raises the battery voltage
to over five volts, the battery will communicate with the
PowerCenter and the normal diagnostic tests will then be run.
Caution -Repetition of the recovery sequence may cause overheating
of the battery. A second attempt can be made after the battery is
allowed to cool for 10 or more minutes outside of the PowerCenter.
