So much snark in this thread.
There are two ways you can be tracked via your phone.
1) if it is a GPS device, a lot of apps use your position to work. For example, I was at a local mexican restaraunt last night. My google ap on my cellphone popped up....asking for info about the place. Kinda spooky. Furthermore, your minute by minute location gets stored by some apps. Some of those apps communicate with the government.
2) If you have an old cell phone, or a new one with GPS turned off, your location can be determined by “triangulation”. Your cellphone pings all the cell towers around you saying “here I am. Any calls?” Your position can be found by your distance from the various towers.
Methods 1 and 2 can be defeated by turning off your phone and removing the battery.....unless you have one of those models with a capacitor that keeps certain functions like GPS active for a long time after you remove the battery.
The battery only helps with the tracking insofar as to provide power for certain functions.
Hope this helps.
You say that like it's a bad thing.