CR2032 COIN CELL, 15MM-SPACED SOLDER PINS. Internal Backup Battery for the Kawai K1, K1-ii, and K1R; the Roland TR-505; and the Yamaha DX7, DX7ii, DX7iiFD, KX76, KX88, TF1, TG series, TX series, RY10, RY20, RY30, SY55, SY77, SY99, and V50 gear.