[Elecraft] Powersonic 2.9 Ah batteries for the K2

[Dave]

I wonder if the problem could be the battery never achieved 2.9 Ah and 
was therefore withdrawn? I haven't seen Yuasa or similar batteries of 
that size/capacity, which is rather odd considering most other batteries 
seem to be offering more capacity as the years go by. Has anyone 
analysed the Power Sonic battery to measure the Amp hour rating?

Dave, G4AON
K2 #1892 with a non PS battery