I only shoot occasional events however I do use my flashes extensively for fill lighting/effect lighting and I have found the Energizer Nimh rechargables to be very effective. They hold a charge well, have lots of current (2300mah) and have lasted much better than any other brand I have used to date. I bought 3 sets (12 batts) almost 2 years ago and rotate them through my flashes - still working strong. I primarily use a Nikon SB-910 and I have a Metz 50AF-1 as secondary - boths flashes work great with them.
- JRosen likes this