(Sorry for reply in English!)

Unlike the BC9000/9500, the BC9300 is based heavily upon the BC2300/2500 and the battery is located in a different place, under the metal cover of the microprocessor on the main PCB in the centre of the Beocenter.  This thread may help: 

I think that the microprocessor board with the metal cover is under the PCB marked in green:

Login to view image

Hello Guy!
Thank you so much for the quick answer on a friday evening ;-) and all the best from Cologne to the UK ;-) I just checked the BEO 9300 and I think you are absolutly right. The battery seems to be located under the metal cover under this PCB you marked in green. That seems tricky. I hope that I can remove the PCB without damaging these very small cables cause I totally have to remove this PCB. Do you think I can remove the cable sockets without damaging or just leave them at the PCB trying to get under it ?
Have a great weekend!!!!

Stefan

Thanks Guy! Will try tomorrow. Good luck with the game and enjoy the red wine!!!!!

Hi Guy,
I hope you had a nice evening - with rugby and red wine ;-). Who was the winner?
Thanks to your advice, I found the battery below the left PCB (picture Battery found). I only had to carefully detach two cable connectors from the PCB to the right of it (Battery removed cable) and then carefully lift the board above the metal box and turn it to the left. Anything else would have been too time-consuming, as I would have had to unplug all the plugs from the metal box. So I will probably get to it well with the soldering iron.
The yellow residues on the battery are only adhesive residues from the protective paper on the battery - no leaked liquid from the battery.
Now I'm going to order a new good button battery. What do you think? Is the battery only soldered to the contact plate at the top of the + side? Do you think that I can simply pull out the battery at the top after soldering it free from the + (top) side or is it also soldered at the bottom of the - side? Is hard to see?

Best regards! Stefan

Hi again Stefan,

The rugby was a bit one-sided as France beat Wales 43-0, and England's defeat against Ireland yesterday wasn't much better!  The Rugby 'six nations' runs for the next few weekends so hopefully it will improve!

Well done for finding the battery.  Regarding replacement, it is NOT a good idea to try desoldering the battery from its terminals as there is a danger of the battery exploding if heat is applied.  They are spot-welded in place as far as I know.

Ideally, you need to replace with one of these which has the correct pin spacing for the holes in the PCB:

Thanks once more Guy!

That was a "close" result......hope the wine was better ;-)
Will do so and will use a desoldering pump as well. Just ordered it...

Take care !

Best regards!

Stefan

 

 

Hello8 Guy,

I made it. Used a desoldering pump and now waiting for the new battery ;-)

Best regards!

Stefan