The Hioki BT3563-01 benchtop battery tester supports simultaneous high-speed measurement of internal resistance and battery voltage for the ever-expanding production lines of increasingly larger lithium-ion low resistance batteries, and other battery packs for high voltage applications. The BT356301 battery internal resistance tester can measure the voltage and resistance of battery modules, high voltage battery packs, fuel cell stacks and other large batteries up to 300V.