Originally Posted by KnotSoFast

.
Great idea, but the battery in the S2 keyboard is 12v and the S3 is a 5v machine. So unless you want to simulate a Samsung Galaxy Note 7, do not use the old kybd with the S3 Surface. (The good news about the S3 battery is that it has a standard USB micro plug and essentially ANY USB plugged charger will charge the S3 including my iphone charger!)
.