I finally got myself a big flash. The problem is it uses 8!! batteries. It's old enough that I doubt the words NimH or maybe even Nicad had crossed the minds of designers. What are the issues in using these types of batteries? The voltage is lower but that shouldn't be an issue. I've heard problems with the batteries providing power quicker then alkaline batteries. How much of an issue is this? Quantum makes a battery for the flash but the price seems crazy. It's just a 12v lead acid battery and a charger. Is it possible to use a Quantum module with a third party battery? I can buy a 12v battery locally for $10. FWIW it's an Agfatronic 643. Hopefully it works when it shows up. OTOH the thought of feeding it batteries makes me wonder.