adammelancon, these are just wires/connectors - they don't put out any amps.

I'm not sure if the 770 and 800 have the same power connectors, but I use the Nokia CA-100 for my N800, purchased at Amazon to charge from my computer or other USB power sources. See the detailed power information I posted in this thread:

http://www.internettablettalk.com/fo...ead.php?t=8251