This is not the most used battery format, the most common being LR6 and LR03, but we sometimes useful mainly in toys. The price / quality ratio is about right if you do not want to buy back all four mornings batteries. Duracell is the most successful in the long term. The packaging of this lot is convenient since it lets out the number of batteries needed without the others out of their housing. There is nothing more annoying than trying batteries which are scattered in a drawer. This pack regards Duracell Plus Power and batteries do not benefit from the Powercheck function to check the amount of remaining power. This technology is found on the Ultra Power.