Binatone - Speakeasy Combo 3610, Concept 2310, Symphony 2610, G11 1839

NiCad 250, 280 batteries 300mAh batteries are compatible with new NiMH batteries
NiMH 650 are compatible with 550, 600, 700mAh batteries
NiMH 850mAh batteries are compatible with 750 and 800mAh batteries