Strengths: -Works together with the main 9-cell battery of my TM8200 -Adds about 1-2 hours of battery life ontop of the main battery. -No noticable heat produced -Light weight -Nice outside finish blends with the laptop

Weaknesses: Replaces cd/dvd drive

Summary: Acer power mangement automatically detects and displays the remaining charge (in percent) of both batteries. No screws hold the cd/dvd or battery, only the lock switch. It takes a little bit of force to get either out since the switch doesn't auto eject the drive/battery.

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