I've got a Pegasus 2+ module that is not retaining files (.dmp) loaded from floppy. When booting up, he error message comes up. Always did but never lost memory. There is external box on back containing batteries (customized?) . Maybe need to be replaced? Might I lose something if I take batteries out? This error happens when I disconnect from power for more than a day.

Yes, the batteries have probably had their day and will need replacing, (The box on the back was a user mod so that you did not need to keep opening up the case to change them) all user data will be lost (But this is happening anyway) so make sure you back everything up to floppy.

Bill

Are these a special rechargeable battery, or lithium, or ?? Something I won't find locally?

It depends on version, best to contact Wersi USA http://wersimusic.com/more/service/ who will be able to point you in the right direction. (NOTE: It can sometimes take a while to reply)

Bill

Yes awaiting response from Ralph or Chris a few days..

Bill,

Are Ralph and or Chris, or anyone at WersiUSA still active? No response to emails or phone messages.

There still on the Wersi (Music Store) website and they have communicated with others, so yes they are still around, but as I said in my last post they are not exactly responsive.
You can try emailing one of the addresses here http://www.wersi.net/haendler.html (Scroll down for Wersi USA) as they seem to be different to the ones on the Wersi USA website.

Bill

No response. Bill, can you ask around and see if anybody can get me a brand or model # or voltage /type for battery? I can get a serial # of unit.

Here are 4 links to try, 2 are German and have been selling Wersi for decades (They will reply in English) 2 and Wersi forums.

www.wersi-hochrhein.com
www.replay-serviceteam.de

This is to the Wersi USA Forum http://wersiclubusa.com/ where Curt the owner has been in regular contact with Wersi USA.

This is the General Wersi Forum https://www.tapatalk.com/groups/wersiownersforum/ where a where a number of owners have owned a wide range of Wersi instruments.

Bill

Well after getting external compartment open and risking losing all programming, I discovered simply 2 commercially available rechargeable AAA batteries..going to store shortly.