DX7 BATTERY CHECK = 4.3V instead of 3V even after replacing it with new compatible battery - Music: Practice & Theory Stack Exchange
The Spektrum DX7 9.6v 1500mAh Ni-MH Transmitter Battery Pack is a spare part for the DX7 2.4GHz DSM2 Remote control transmitt… | Remote control, Remote, Transmitter
REPLACEMENT 3V BATTERY for Yamaha DX7 TX7 DX21 TG77 RX15 RX17 RX21 + many others - $9.95 | PicClick