In addition to USB driven fun, I bought USB driven light so that I can . As I decided to join the class without any electricity, I started to use this light in my online English class every night.
That is, I disconnect electric source when I join skype English class.
If we keep PC battery full, I can talk with online teacher more than two hours.
The light is not enough to make my room bright and some teachers may fear that a ghost may appear behind me.
We need to prepare for avoiding sudden blackout this summer.
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