You CAN charge the M600i over USB, but you need to enable it on the phone first. Bizarre, but there you go. Go to main menu, select tools, select control panel, select connections, select USB and tick the 'Allow USB charging'...
Why it's not done by default, is anyone's guess. Shouldn't imagine Sony Ericsson can even explain its choice...
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USB charging DOES work!
You CAN charge the M600i over USB, but you need to enable it on the phone first. Bizarre, but there you go. Go to main menu, select tools, select control panel, select connections, select USB and tick the 'Allow USB charging'...
Why it's not done by default, is anyone's guess. Shouldn't imagine Sony Ericsson can even explain its choice...