Acer E300 Series User Manual page 33

Acer e3XX Series fundamentals
To recharge the device using the car charger:
Use the car charger to recharge your device while it is mounted on your
vehicle.
To recharge the device using the USB cable:
The Mini USB Sync and charge cable that comes with your device enables
you to connect your device to a computer running on the Microsoft
Windows platform. When connected, the device battery is also recharged
via the USB connection.
Go to the "Establishing device-PC connection" section for instructions on
how to connect your Acer e300 Series Travel Companion to a computer.
You cannot simultaneously charge the device while transferring files thru the USB cable.
The device will recharge the battery only after the finishing the file transfer function.
Acer e300 Series Travel Companion 25