The VIKING 135 Amp, 6/12V Battery and System Load Tester 58944 is a reliable and efficient tool designed to test AGM, Lead-Acid, and Gel batteries. With a voltage range of 12V, this single item tester features an LCD display for easy reading. Manufactured by Viking, known for quality automotive tools, this product is a valuable addition for anyone looking to ensure the health of their battery and system.