I had 2 with the same/similar issue a year after I purchased them, all 7s or other random displays, changed the batteries no better. I ended up throwing them away. Too bad I really liked them when they were working.
I have had mine for 6 months or more. It retains the measurment on the screen.
It might not work on some "fancy" alloy-spoked wheels but will work on most wire-spoked ones.
It is factory calibrated. Just have your unit replaced for free at your local Home Depot. Huskys have a lifetime warranty.
Yes, but not a requirement.
All electronic equipment equipped with this type of power switch (push-to-turn-on) consumes power even when off. If you keep the unit in the glove box, make sure that it doesn't get randomly turned on and nothing is pressing on the switch. I had mine for 5 years now and I still have the original battery on it. I keep a small piece of plastic insulator wedged between one of the battery and the contact terminal to ensure that the battery circuit is cut off and won't drain. I just remove the the insulator when I use the gauge.
Might need to ask the manufacturer. Personally I never put a magnet on anything electronic.
No I dont think so as there is no valve stem to depress the sensor on the gauge.
Press the power button successively to change units.
No I did not see that