Energizer has definitely impressed me! I definitely recommend these to everyone. They definitely are worth their money and will save you some too! Here is some of the company info.
Last up to 4x longer in digital cameras (versus Energizer® MAX®. results vary by camera)
Lasts 20 hours longer* in wireless gaming accessories. Results vary by play and/ or usage patterns.
Last up to 30% longer in personal audio devices (versus Energizer® MAX®. results vary by device)
Weigh 1/3 less than standard alkaline
10 year storage life
Leak resistant construction