The message
from Owain contains these words:

Until Alkaline battery manufacturers state the Ampere hour capacity
on each
battery, I will believe that they are all the same and buy the cheapest
available.
Their argument against doing this is that the effective Ah rate of each
cell differs at different discharge rates and that comparing like with
like wouldn't be possible.

But doesn't the Ah rate of nicads vary in the same way?

Yes, but the NiMh market has gone the way of revealing it (though not
always with great accuracy). If a couple of primary cell makers would
start printing the figures on their cells it wouldn't be long before the
others followed.

IIRC there is a "gentlemen's agreement[1]" between Ever Ready and
Duracell over marketing the very highest capacity cells in Europe.

[1] qv Consumer ripping-off system.

--
Skipweasel
Pay no attention to that man behind the curtain.