The Bva-2100 Is The Ultimate Electrical System Tester Specifically Designed For The Heavy Duty Market. Through The Use Of State Of The Art Digital Circuitry And A 400 Amp True Load System System, The Bva-2100 Delivers The Words Most Accurate, Relaible, And Fastest Testing Results For Batteries, Charging Systems, Starting Systems, And Voltage Drop Testing For Heavy Duty Applications.