When my Cruz goes flat I have to leave it plugged in to the charger for a couple of hours before I can use it again - I don't use it while plugged in, the cord's too short. And it won't charge through the USB port at all. I've found it to be a little fussy to turn off; I have to wait for that turn off display to be complete before I tap it, otherwise it just goes to (semi-)sleep.
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