vintrons 900mAh Battery For Avaya 3725, 3720, 3725 DECT, 3720 DECT, DH4, DH4, WH1, Please ensure both model and battery part number are matched with your device. - Compatible Model: ALCATEL omnitouch 8118, omnitouch 8128, ASCOM D62 DECT, DH4-ACAB, AVAYA 3720, 3720 DECT, 3725, 3725 DECT, DECT 3720, DECT 3725, DH4, WH1, - Compatible Battery Part Number: AVAYA 0486515, 660190/R1A, - RoHS approved for toxic free. - CE and ISO9001 Certificate for quality assurance.