I use them for my canon 430 ExII flash as well as a flash YongNuo and there is nothing wrong, exceptional durability, once loaded they have a very good stability over time, with 300-500 photos made and no concerns of lack of batteries. the value for money for an amateur or professional use are the height of the reputation of that mark in the world of photo.je do now uses only Ansmann eneloop and as a means to feed my flashes