This only seems to work when the battery is fully charged 12 volts. So if you want to test a battery that won't tip your car/truck and its voltage drops to 11 volts, let's say it won't even turn on. I went ahead and bought a real counter as it was just a box with two wires and bulbs and I already have Christmas tree lights so I don't need another box of bulbs.
Vgate ICar Pro Bluetooth 3.0 OBD2 Code Reader | Scan Tool For Torque Android To Check Engine Light & Car Faults
19 Review
Vgate ICar Pro Bluetooth 3.0 OBD2 Code Reader OBDII Scanner Scan Tool Car Fault Diagnostic Check Engine Light For Torque Android
22 Review
Upgrade Your Car Diagnostics With 16 Pin OBD2 Extension Cable Splitter - Male To Dual Female Y Cable - 50CM
17 Review
eTORK 3/8-Inch Drive "Click Style" Electronic Torque Wrench: Precise Torque Control (25-250 In. lbs., 2-20 ft.-lb.)
12 Review