Single load, dynamic-resistance technology minimizes battery drain while testing. Tests both charged and discharged batteries accurately. Developed exclusively for powersports batteries. Determines battery health and charge status in seconds. Digital battery tester prints recommended actions. Includes a heavy-duty plastic case, two rolls of printer paper and four AA batteries. One-year limited manufacturer's warranty.. Charging system check.. Voltmeter: 1.5V. 42 Tester