Upping the capacity of AA cells was the name of the game again this year at the big PMA show in Vegas. This race, fueled by the increased power demands of mainly digital cameras, has battery manufacturers scrambling to out-charge each other. Traditionally, alkaline AAs have been pegged at about 1500 milliampere-hours (mAh), but several vendors showed AAs rated at 1900 to 2100 mAh, with 2300 mAh cells promised very soon. This is up from last yearÕs 1700 mAh offerings. With mAh, more is better. These ratings are specified at the industry-standard C10 currents, one-tenth of the mAh rating. We test at one ampere-five or more times the current manufacturers' rating tests because that figure is closer to the requirements of real-world electronic flash units.