The Megger 35755-3 battery-operated printer allows recorded data to be printed from the Megger BITE 3 battery impedance tester. The thermal printer has a 4.25" (110 mm) printing width, and it comes with thermal paper. The printer also comes with a DB9 M-M adapter and a DB9 null modem adapter for connecting to the BITE3. It operates on a rechargeable nickel-metal-hydride (NiMH) battery pack (battery and AC charger included). The printer measures 6.30 x 6.70 x 2.62 inches (160 x 170 x 66.5 mm, H x W x D, where H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; and D is depth, the horizontal distance from front to back), and it weighs 18.7 oz. (0.53 kg).

Battery testers are used in the industrial, commercial, medical, telecommunications, aircraft, power utility, and military industries to detect the health of a battery. They can measure conductance, impedance, voltage, and current, among other parameters. Battery testers are designed for specific types of batteries, such as lead-acid, nickel-metal-hydride (NiMH) and alkaline batteries. Some testers require a load to be applied to the battery during testing, and some do not. A variety of test leads with contacts, probes, clamps, clips, and other connectors can be used to connect a battery to a tester. Since different testers can measure different parameters to calculate battery health, it is important to use the same tester for consecutive tests on a single battery when analyzing changes in battery health over time.