Always count on energizer! - Energizer e2 CR2 Lithium 3 Volt Batteries EL1CR2BP - EL1CR2BP2

As always, you can trust the name as almost everyone has used this brand for something. This was a no brainer to buy this for my Tactical Lasers! No need to worry about longevity as this battery tends to hold power the longest!
Pros: Great Shelf Life
Cons: Little Pricey but you get quality

This review was written in the old system and had content requirements that are different than reviews written today.