1 ZB2L3 Battery Tester. Finished Size: 50mmX37mmX17mm (length X width X height maximum position size, contains copper foot height). Maximum battery capacity range: 9999Ah (1Ah = 1000mAh) greater value by shifting the decimal point to switch, when the display is less than 10Ah X.XXX, as shown above to achieve 10Ah XX.XX, and so on.