vintrons (TM) Bundle - 800mAh Battery For AVAYA 3810, 3910, 700313067, BT-2499A, vintrons Coaster Volts: 3.6V / Capacity: 800mAh Type: Ni-MH Size : 56.23 x 42.51 x 16.60mm Package Include: Replacement Battery and vintrons Coaster vintrons and the vintrons logo are registered trademarks of Vintrons Company Ltd.