The Sourcetronic battery testers from the ST2523 series accomanded in a robust case own a great 4.3“ color display. The different devices decide in input voltage. While the battery tester ST2523 is advisable for for input voltages up to 65V the ST2523A is suitable for maximum input voltages of 350V. Test methods is amongst other things 4-wire measurement which allwos an accuacy of 0.1%. As interfaces are USB, RS232 and GPIB available.