eneloop XX 8 pack of AA Batteries from Panasonic deliver up to 2,500 mAh of performance for long-lasting, high-power capacity applications. XX batteries are the ideal choice for powering high current consuming devices such as DSLR photo strobe flash units, often providing more than twice the number of flashes per recharge in less than half the time of conventional alkaline batteries. These batteries will work down to -4°F.