I picked up a Zeikos multi-power battery pack for my Nikon D300. The price was $54 via Amazon. The D300 has a theoretical limit of 8 FPS. I’ve only been able to get 4 or 5 in most tests. With the extra power I expected 8 FPS, and I got it. I ran a set of AA batteries through the several tests and got a consistent 8 FPS in each test.
I was afraid of buying an aftermarket product at such a discounted price. The Nikon version goes for $242. I took the risk and can honestly say that I am please. The Zeikos unit is solid and professionally made. Plus, all of the buttons work like they are supposed to work.
The only trade off I see is the pickup in weight. Of course this is offset by the coolness factor of of the professional looking rig. I think I can handle the extra weight.
I’ll have a chance to test out the rig this weekend. I have floor seats at a Gymnastics match at UCLA. I finally get to see my cousin compete. I’m excited and do not want to miss a shot.