We sat in our advertising agency a lot of batteries made by different manufacturers. However, the 2500 Ansmann batteries are by far the best. We put the batteries in wireless mice, wireless keyboards and in our flash and so far are all very happy with us. We have the batteries despite summoned charged before use which was certainly useful. The flash we rarely use, with conventional batteries it was therefore always annoying that if you have used it, the batteries were empty by the self-discharge. The Ansmann maxe there are no more problems.