For years, professional photographers have trusted PowerEx high-capacity rechargeable batteries for use in their external flash units. Environmentally friendly and less expensive in the long run, their performance is superior to alkaline, with their significantly faster flash refresh rates. The 2700mAh model is so good you just may choose to leave that external battery at home!

These batteries have been field-tested and approved by other nature photographers. The PowerEx ultra high capacity AA batteries offer a super-long run time; up to 30-40% more than some competitors! Memory free operation means you can charge PowerEX batteries anytime, and these batteries can be recharged hundreds of times.