Basically, I make a distinction between batteries at cheap Noname - products and brand batteries. The difference is present in price and performance, the Noname Batteries are usually a lot cheaper, but they are not of the durability and endurance nearly comparable to the brand batteries.
In the present case the Duracell Ultra Power batteries have a much longer duration, which lay at my test at different Noname batteries at least about 30% percent. I will continue to use for devices, which have a higher consumption, the brand batteries.
Conclusion: brand batteries, in contrast to the widespread Noname - batteries a longer duration and thus a higher price is justified. However, the huge price difference is only partly justified, why four stars.
