The slots on the back are positioned for quick insertion of AA, C and D batteries for a quick test. green and I know the battery is operational. The 1.5V, 9V and 12V settings allow for a quick battery test of most common batteries, including car batteries. The LED backlit screen is really good. Easily switch between AC and DC with the push of a button. It's easy to test resistances. I've had cheap port charge voltmeters on 9v batteries and they didn't last long. Much cheaper and less expensive AA batteries are used for this.
🔌 Klein Tools NCVT2PKIT: Dual Range Non-Contact Voltage and Receptacle Tester for Versatile Applications
9 Review
VT500 Voltage Tester: 12V-300V Non-Contact & Contact, LCD Display, Buzzer Alarm & Wire Breakpoint Finder
21 Review
⚡️ Fluke T5600 Electrical Voltage, Continuity, and Current Tester: Accurate and Reliable Electrical Testing Solution
9 Review
💡 AmazonCommercial LCD Display Non-contact Voltage Tester for Working, Double Mould, Flashlight
10 Review
💡 High-Quality Advance ICN-4P32-SC Electronic Fluorescent Ballast: Ideal for 4 Lamps, 32W T8, 120/277V
3 Review
Wireless Electronic Ballast Interface Certified
8 Review
💡 Hydrofarm Quantum QT400 Dimmable Ballast for 400W Grow Lights
5 Review
Fulham WorkHorse WH2-120-C Adaptable Ballast - 2 Pack
3 Review