2 ms·
It depends on the module and the car. Some cars power the ODBII port all the time. Some dongles are smart enough to stop drawing power. I had cheap Bluetooth do
by ianburrell 10y ago
It depends on the module and the car. Some cars power the ODBII port all the time. Some dongles are smart enough to stop drawing power. I had cheap Bluetooth dongle that drained battery a couple of times when left plugged in for week. Better one doesn't cause any problems.