Review on 🚗 Efficient Autool BT50 Car OBD2 ECU Emergency Lighter Power Cigarette Cable Battery Tool - Quick and Reliable Solution by Jimmy Franklin

High quality equipment! The price is right. Shipped from China, delivered undamaged. I use this gadget to save my car's memory settings when replacing a dead battery. The cigarette lighter end installs in a separate power supply for 12V system backup power. If you don't do this, many vehicles will likely reboot their computer, or it will take time for your car to go all the way back to the dealer and repeat the entire boot process. Some cars have a built-in security system, and when you change a dead battery, they block the starting system. I've read a bit about it, every MFG machine has it's own little tricks. Check your settings and make sure your dealer knows you want to save your memory settings if they recommend a battery change! That means radio settings, seat settings, steering wheel settings, side mirror settings. Much luck. and I hope this helps someone!