Backup CF cards with no computer

thanks but:

- I would prefer something rechargeable in USB for instance (ie without another transformer to add to the one of the computer, the one for the camera, the one for the phone...).

- It is quite heavy (390 grams)!

- Not sure old models can read 5DIII raw files

- I don't need to see the pictures (ie without LCD may be it will be more compact, lighter and less fragile)