Replacement BPL300 Ultra Extended Battery.
The 1950 mAh capacity rating is 22% higher than the OEM's 1600 mAh capacity rating. This Ultra Extended battery will extend phone Talk Time by 22% or 4-6 hours longer than the original.
Will work on the following Spectralink Avaya Nortel phonesPolycom LTB100 6020 6030 8020 8030 Avaya 3641 COMCODE 700430408 Avaya 3645 Comcode 700430416 Nortel 6120 NTTQ4044E6 Nortel 6140 NTTQ4021E6