C655 freezes when unplugged from power supply

I just got my Satellite C655 back from having something fixed from the store I got it from. When I turned it on this morning I noticed the battery was around 59% so I plugged in my power supply - like I often do anyway so I don't run down my battery when i'm at home. After a few hours of regular use, I was about to turn off my computer, so I unplugged my power supply. However, my laptop froze when I unplugged. It stayed frozen for 20 minutes until I had to do a hard reboot by pressing the power button. 
What caused this? I asked the store and they said they did nothing with the power, but I recall this happening before when I got it back from them.

It's likely that your iPod's battery is shot and in need of replacement.  You can have your iPod serviced by Apple or a 3rd party repair company ( a little bit cheaper).
B-rock

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    In daily use: R60F, R500F, T61, T410
    Collecting dust: T60
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