No way. I have no idea how mAh are measured in a lab, but they are certainly not in relation to 1V.

To get Wh, multiply by voltage. 2.6Ah * 1.2V = 3.1Wh. 8Ah * 4V (one cell is my assumption) = 32Wh.

The battery has 10x the capacity of a NiMH (that's the lower limit, it could have two cells but that seems a bit excessive for such a device).

Other than the battery discussion, Nokia devices running RT are about as interesting as the dirt on my shoes.