With the OBDResource BM100, none of this happens. 1x OBDResource BM100 Main Unit. 2 Plug the red light connector, then insert the OBD plug into the vehicle's OBD2 port. A "beep" sound confirms normal connection.
2 Years Software Update Subscription Card for LAUNCH X431 12V OBD2 Cars Scanner
12V OBD2 ECU Memory Saver Emergency Power Supply Cable Car Battery Replace Kit
Creator CBT-20 12V OBD2 Car Memory Saver Cable with Voltage and Current Display
OBDResource ST100 Spark Plug Tester Dual Hole Adjustable 0-6000 RPM 12V Gas Car
OBDResource Car Battery Tester 6V/12V/24V Analyzer Diagnostic Tool SOC SOH CCA
OBDResource Car Battery Tester 6V 12V 24V BR502 System Analyzer 100-2000CCA