<head explodes>
I stick to good old KY jelly.
Oh wait, you’re talking about batteries
They don’t seem to put capacity on old fashion alkaline batteries packages. I had to poke around for a while to find these. With the rechargeables that information is in big print on the packages.
http://data.energizer.com/SearchResult.aspx
The energizer regular alkaline AA is 2850 mAh. The e2 batteries from energizer have 2900.
Nah, I’m just yanking your chain right back atcha, is all. 
Another difference between Alkaline, NIMH, and Lithium (Lithium-Ion rechargables and disposable primary cells) cells is that alkalines sag more under load, as well as have higher internal resistance
a NIMH has a lower nominal voltage, but that voltage stays more level and steady as the cell discharges, so it’s delivering current more consistently than an alkie
Lithium based chemistry has the highest energy density (Lithium AA cells are 1.7 actual volts, not 1.5) and an extremely flat discharge curve
scroll down to the runtime graph for this flashlight it shows the major differences between the three chemistries