It's a standard DC input so you can power it off anything pretty much. The connector is standard so no proprietary connectors or cables.
That was another reason for me to go with the AV80R as I like having everything USB. The AV also charges from the USB port so you can charge it up while you have it plugged into a computer/laptop without needing an external adaptor/charger.
I think the Aera is USB also, but it does have a proprietary connector on the back of the unit - be worth asking if you need that for charging/downloading/connecting to a computer or if it has a mini-USB port onboard you can use. Garmin seem to love proprietary connectors, so it'd be worth checking what the connection/charging options are.