iDect - AAA batteries for iDect C5i, D1i, M5i, Q1i, X5i, Z1i and Eclipse cordless phones

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