Battery only is charged on the '05 and up versions. I think that one needs the battery changed.

Lots of info on different threads in this site.

 

More than you ever wanted to know about MINI keys:

https://www.northamericanmotoring.co...rbishment.html

This NAM member really did their homework on these keys- to the point of putting up a Google website:

https://sites.google.com/site/minian...emotekeys/home

His reprogramming tips may help you. Please also note that the door lock is really not designed for long term use. Here's some pictures of what happened to my door lock when I started using it everyday:

https://www.northamericanmotoring.co...or-repair.html

Val