New alkaline batteries with 10-year shelf life—what's changed?
The Duralock battery has improved alkaline cells (improved purity of actual chemical ingredients) not only this but the Duralock battery protects the anode and cathode with separators that limit power transfer when the battery is not in use. On top of this, it has a sort of triple corrosion protection that surrounds the contents in an acid resistant, anti-corrosive exterior. Therefore ensuring shelf life.

Although probably not a complete answer,
Hope this helps