Synergy Digital PDA Battery, Works with Sony MZ-R35 PDA, (Li-ion, 3.7V, 2300mAh) Ultra High Capacity, Compatible with HP F1255-80055, F1255A, F1287A Battery - Walmart.com
SONY MZ R50 MINIDISC Player Recorder With Sony Microphone - Etsy Israel
Walkman Minidisc Player External Battery Pack Case For Sony Md Cassette N1 R900 - Accessories - AliExpress
HQRP Battery for SONY D-NE900, D-NE920, D-NE9, MZ-E25, MZ-E30, MZ-E33, MZ-E35, MZ-R909, MZ-N910, MZ-N1, WM-EX20, D-NE830 D-NE830LS Portable CD / MD / MP3 Player - Walmart.com
Amazon.com: HQRP Portable CD/MD / MP3 Battery Compatible with Sony NH-10WM NH10WM MZ-E520 MiniDisc Player : Electronics