[villagetinker]

I have been watching this thread, and it appears there is a solution: Reconnect the speedometer so it is TURNED OFF with the key, yes if it is like my aftermarket unit, you will not get any readings for around 30 seconds, I have been living with this for several years, it is not a problem. I cannot believe that the vendor has not figured this out. All the wiring is under the dash, you remove the current power supply wire to the speedometer and reconnect to the SWITCHED lead from the ignition switch. When done double check to make sure there are no other parasitic loads.
My other concern is the QUALITY of the factory batteries. Our 2016 vintage had a standard automotive grade battery, lasted at least 3+ years, and the replacement from Advanced Auto is going strong after 3+ years.
If someone has a wiring diagram I will be glad to make up the necessary changes and post.
I cannot believe the problems this is causing.