Technical Stilo door lock remote

[maduus]

Hei everyone,

I have a Stilo 2002 and the door lock remote isn't working properly. The range it can lock and unlock doors is not more than half a meter. I guess it should work much farther away. I changed the batteries with new ones exactly the same as there was before, but it still works the same.

What kind of battery should be in there and what is the required voltage for it?
See the pictures I attached. Mine has two 3 volt CR1220 batteries inside.

 

[Fiat 971]

Hello, I changed my body computer on my 2002 Stilo Abarth, but since then the remote control key only works at a very short distance (inside). I've changed the batteries but that doesn't change anything, I've deprogrammed the 2 keys with Multiecuscan and they're still the same. Do you have any clues for me? Thank you for your help.