VINTRONS Li-ion BATTERY Pack Fits Vocollect 730022, 136020805B, Talkman T5, Talkman A500 Capacity: 4400mAh / 16.28Wh Type: Li-ion Volts: 3.7V Size : 84.91 x 42.50 x 28.23 mm Certificated with ISO9001, RoHS & CE;