Mine's slightly different from the one on the clip, but the nearest I could find. I was watching the time on the clip thinking "he's going to get this out easily", but no.
The obvious way to get access is to spit the case, but that's proving easier said than done, but I suspect it'll be back to that.
Other possibilities are creating a "tow rope" - either soldered or Araldited on and trying to pull it out. It tilts slightly, but not enough to get a grip with anything.
Thanks for all the input. I've found another clip, this time of the exact model (E6239), in Russian. If you have a look here from about 8:20, you'll see the problem and hear how unimpressed (much forefinger poking) the Russian gent seems to be with the CMOS battery location.
I've checked the voltage in situ and it's around 2.5v, so it needs changing. A small screwdriver slipped in from the left flips the battery up slightly, but, as yet, I haven't managed to get enough of a grip to force it out.
I tried splitting the case this afternoon and got around half way using thin plastic - credit card size. Problem was, it was getting to the stage of needing more force than the plastic was likely to survive, so I may well follow octal's suggestion and do a little bit of surgery on the plastic covering the battery area. At the right hand end of the plastic over the battery holder, there's what looks like a screw but is actually a "spot weld", for want of a better description. I may try drilling that out to try and create a flap which I could easily re-secure with tape. Biggest problem is seeing what's on the other side.
Funny you should say that. I've just been trying to find my small mirror on a stick (ex GEC switchgear toolkit) to try and get a better look. At the moment, my thinking is that a wee bit of internal plastic damage that I can patch up is infinitely better than a broken case.
As jb said, why's the battery not accessible under a small manhole. No reason why it couldn't be in a receptacle similar to a fuse on a moulded 13A plug.
I've sent a query to Medion, but I'm not holding my breath.