Hi Sergio, what about rechargeables?! NiMH and NiCad cells give you a shorter recycle time for your flash. You can also run your camera with these cells. The startup investment - cells plus charger is a bit more expensive - but on the long run (after a _few_ charges) it is cheaper, better for our world, gives you a higher flash performance and no bad feelings when you have empty one - way cells in your hands - at least I get these!! Disadvantage: You need to charge these cells regualarly even when not using them (I do it every 2 - 3 weeks even when I don't use my camera equipment) because of their self-discharge. That's it. So 3 pluses vs. 1 minus - go for rechargeables! Greetings from snow-white Vienna, Austria sImOn
