good deal, repped. as for comment about slow charging through USB, it's no different then plugging into a wall outlet with a USB outlet for most devices. this will work well in stuck in places without external power. ie, camping, airport etc
It could cause your computers pwr supply, to fail, if it is not large enough. Too many USB peripherals could do that. I would rather get a line powered transformer to charge the battery, or a line powered USB adapter.