I'm playing two ancient MS-60's. Do they have batteries? The units are over 12 years old and used 5-10 times a week. Also, I use a 10 year old Hammond XB-2. Same question. My SH-201, GW-7, G-70 and Nord Electro are new. Same question. What about my used Midjay? Would hate to lose registrations/presets.

Thanks,

"Techno deprived" Russ