In most cases, the battery status indicator reports a full or partial charge, and the Apple System Profiler reports a normal battery connection and capacity. When systems affected by this issue are powered on while disconnected from an external power source, they briefly begin to startup then power down immediately. In particular, this issue has plagued some MacBook Pros, which suddenly shut off whenever disconnected from external power and refuse to operate from the battery. We previously reported on an issue where various Apple portables suddenly and unexpectedly power off under differing circumstances, including but not limited to: disconnecting the unit from external power while a battery charge remains putting the system to sleep either while a power adapter is connected or there is a battery charge remaining.
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