AA Battery mAh rating
mAh stands for Milliamp an hour. This is commonly used to describe the total energy a battery can store over time. the higher mAh rating means when fully charged, the battery can power a device that consumes more power and/or for a longer amount of time before depleting and needing a recharge. For example, An AA Battery mAh rating of 1500 mAh can power a device drawing 100 milliamps for 15 hours, or a device drawing 150 milliamps for 10 hours.