Chimaera 400 key fob battery change…

Chimaera 400 key fob battery change…

Author
Discussion

ChrisW500

Original Poster:

132 posts

36 months

Friday 5th August
quotequote all
Hi all

Quick question... I suspect that after 20 odd years the battery is reaching the end of its life! You just can't get value for money any more !!!!

So my question is what battery do I need, and the correct process to do it as I have only one fob and don't want to loose use of the car!

Here is the fob:




TVRMJ

13 posts

7 months

Friday 5th August
quotequote all
The Fob uses two CR1220 batteries stacked on top of each other. I used a thin blade pocketknife inserted at the seam to pry the two halves apart. The two halves just snap back together again

ChrisW500

Original Poster:

132 posts

36 months

Friday 5th August
quotequote all
Many thanks … I assume there is no time limit to do it or potential loss of program?

TVRMJ

13 posts

7 months

Friday 5th August
quotequote all
I had my batteries in hand before starting. Took all of 5 minutes start to finish

sixor8

4,336 posts

248 months

Saturday 6th August
quotequote all
To be safe, do it when the car is unlocked, just in case.....

You may have to press the button on the fob a few times after fitting new batteries until the rolling code synchronises. smile

ChrisW500

Original Poster:

132 posts

36 months

Saturday 6th August
quotequote all
Many thanks!

Classic Chim

11,724 posts

129 months

Saturday 6th August
quotequote all
When you prise your fob open try and do it gently, look carefully how the batteries are orientated to eachother, so you only have to do it once wink

Dr Mike Oxgreen

3,813 posts

145 months

Saturday 6th August
quotequote all
sixor8 said:
To be safe, do it when the car is unlocked, just in case.....

You may have to press the button on the fob a few times after fitting new batteries until the rolling code synchronises. smile
Whenever I do anything like this, I take the roof off first.

lwt

275 posts

264 months

Monday 8th August
quotequote all
When you get the 2 halves apart, note which way up the batteries are. To get them out lift off the seemingly spare bit of green circuit board, again noting which way it sits (its job is just to keep the batteries in place). While its open check that the screw holding the silver key bit is tight. Mine resented first time.

ChrisW500

Original Poster:

132 posts

36 months

Tuesday 9th August
quotequote all
Many thanks for all the advice… all done very carefully and normal service is resumed! :-)

Chris