This is for Renault Megane II .With the key card buttons facing toward you, pull the right hand bottom corner of the key card to the right-There is a groove in the card this is the "Emergency Key!" Pull it out .The battery will be half visible replace with same type "Maxell CR2025". Now you know where the emergency key is too! Only Opens passenger door.Clip on door is pulled and key can be inserted.
Eric (South Africa)
car batteries
use the key
If the battery goes dead flat the door will still unlock manually with the key.
Dead battery in FOB?
If you have recently changed the battery, you may have issues with the key fob operating the locking system. The key fob must be reprogrammed, which you can do yourself first before taking it to a shop.
In cars with central locking, or remote locking, a solenoid is fitted to the locking mechanism. When the remote button is pressed (usually on the key) a signal is sent to the central locking control system. The received signal closes an electronic gate in the controller and current from the cars battery is switched to the solenoid on the lock. The force generated locks or unlocks the door as required.
You lock the car with the central locking. Then unlock it via the key (manually). then turn the key to the first setting, you must do it quickly as it has a timer for the alarm. then you can disconnect the battery and replace/charge it. when you're done, put the battery back in and turn the ignition back off and its back to normal again. It will ask you for a code if you have satnav but its written in the book.
Check the battery, failing that call an auto locksmith who can reset it or re program a new one.
Insert key into lock, twist right, door unlocks.
To change the battery in a Porsche key, first remove the emergency key and the cover on the back of the key housing. Change the battery and replace the cover and emergency key.
How do you change the battery in mazda 5 key?
because if the key doesnt have a battery in for a certain amount of time it looses all the immobilser codes etc. and is cheaper to have it all replaced then it is to have the key recoded.