There are a couple of Volta chargers near where I park. For those who don't know, Volta chargers are free chargers that are found usually in malls or other retail parking lots (all the Whole Foods lots seem to have them). You can use their free app to locate them, which is convenient, but I've found that app to be very inaccurate when it comes to showing how many of the chargers are in use. Has anyone experienced it? is there just a lag between the time someone plugs in and when it shows up on the app?