Need a battery for MD recorder

When I use to do minidisc recordings, I started with one and I was very unhappy with the way I had to "switch out" the disc and insert another one when it came to long concerts. When the Minidisc PCM models became available around 2004, I actually bought two to circumvent this problem to simply keep one on pause/standby while the other recorded. It was necessary at the time, but since then, I've opt to use the smaller recorders that record to micro SD cards or the Sony PCM-M10. Hopefully you will have a nice recording - but otherwise, I would seriously consider upgrading the gear out of the minidisc world. It's simply not the future of recording anymore. :-(