But with the 35% savings, a regular 4-pack is $11, I grabbed my 4-packs of Duracell 2650s for about $10 without any saving, so it's the same as buying offline.
For some reason, my local wholesale store (ok, it's both wholesale and normal retailer) sells 2-packs of Rayovac 2500 for $2.89 the 2-pack, so I grabbed some to re-stock myself until I go to the states, as I'm having a big energy consumption at the time, and most of my old 2050s and 2300s are already dying and the cover is peeling off (well, after 3-4 years of extreme use, I'm surprised)