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Specifications Electrical - 11
Electrical
Main Battery
Rechargeable lithium ion (LiIon) battery
2-4 hours of use before recharging
Power Adapter
100-240 VAC line voltage, 50-60 Hz
Backup Battery
60 milliampere (mAh) rechargeable NiMH battery for calendar/
clock maintenance. Also backs up contents of RAM for a few
minutes while battery is changed (when PowerBook is in sleep
mode)