Quantum ES2 Dummy Battery - Energy Saver 2 f/ Canon 430EZ, 540EZ, 550EX; Nikon SB24, SB25
The Energy Saver 2 is the size and shape of an AA battery. It substitutes for one of the alkaline batteries in the flash battery comparent. Always start with a fresh set of AA batteries. The result will be much longer lasting AA's. The Energy Saver is for : Canon 430EZ, 540EZ, 550EX; Nikon SB24, SB25