BT - Synergy 3000, 3100, 3105, 3105 Twin, 3106, 3200, 3500, 3505, Verve 3010, XC200, XC500, XC100, Studio 1500, Freestyle 4100, Freestyle 350 Twin
BT - Synergy 3000, 3100, 3105, 3105 Twin, 3106, 3200, 3500, 3505, Verve 3010, XC200, XC500, XC100, Studio 1500, Freestyle 4100, Freestyle 350 Twin
NiCad 300mAh batteries are compatible with earlier 250 and 280mAh batteries

NiMH 650 are compatible with 550, 600, 700mAh batteries

NiMH 850mAh batteries are compatible with 750 and 800mAh batteries