My guess is that they are talking about this battery...LG 18650 D1 3000mAh (Pink)
The specs are unreal as are the test results. Plus, their max voltage is 4.35 volts (as opposed to the normal 4.2)
Unfortunately, they require a special charger and I couldn't actually find them for sale the last time I looked.
Do you have a link to the thread you're referencing?
It's on Mike's "weekender" thread.
http://www.e-cigarette-forum.com/forum/battery-mods/496018-weekender-32.html#post11805449
Interesting specs.
T