We test four batteries from the same manufacturer and then average the results. We test all alkaline batteries using an Ansmann Energy XC 3000 battery tester. Using this, we first test that the batteries have a starting voltage of t least 1.5V. Next, we measure capacity in mAh (milliamp hours), which is a standard rating for batteries. Our battery tester discharges batteries with a 600mA load (+/-20%) and stops when the voltage hits 0.94V. After an initial test, we give the batteries an hour to cool down, and then run the test again to see if there's any additional charge. We present all three figures: initial capacity, capacity after the second drain, and the final total capacity. The first figure tells us how good the battery is under high-drain loads, such as games controllers and torches; the total figure tells us how much capacity the battery holds and how useful it is for low-drain use, where not much power is required, such as for remote controls.