This USB charging from the computer... the new 350, 650 and 950 only have a USB (micro) socket but can use wall USB chargers (some, see relevant threads) whereas all earlier models have a barrel socket as well as their USB (mini) socket...
Quote:
Originally Posted by Rumpelteazer
Another problem with charging through USB is that when your computer goes into sleep mode or is switched off it doesn't only stop charging your reader but it also drains it. The reader can be drained to the point that a computer can't charge it. APSP or similar chargers with a barrel tip can recharge it.
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