Economic format batteries that last long

Batteries presented in an economical format (set of 12 batteries). In addition, there is a new technology anti leak and anti energy perdition. Do not be afraid to keep your batteries several months without use, Duracell guarantees as new battery for 10 years. Certainly, I can not wait that long but now it's nice to know that in six months or even one year, batteries, provided that they have never been used, will be like new.

Finally, I have long appreciated the technology to achieve 80% more energy in batteries, it's really good for my little battery hungry devices (desktop mouse, Wake etc)