1. Before replacement, prepare a new battery that meets the model of the car key battery. The battery model can generally be seen in the vehicle owner’s manual.
2. Push the switch upward from the tail of the car key, and the mechanical key will pop up, and then take it out;
3, then use the mechanical key just taken out to resist the gap above the car key, and then pry it out hard to open the back cover of the car key;
4. Take out the old battery after opening the rear cover of the car key, and then replace it with a new battery;
5. Finally, close the back cover of the car key and reinstall the mechanical key.
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