This DIY will tell you how to replace your car remote battery.
Different model and brand might be different way to do but almost the same way.
Identify the screw location and unscrew them.
If you have different remote,
slowly try to figure out how to reassemble it.
If not, you may damage the remote case.
The secret lock has been discovered.
With little bit force, pull them.
2 pieces of coin battery with battery code CR 2016.
Easy DIY. Only need small + screwdriver.
Make sure the polarity of battery is same before and after replacing.