VINTRONS Battery for Plantronics Savi CS540, 86180-01, 84479-01, CS540A, Savi CS540A, CS540 Volts: 3.7V Type: Li-Polymer Capacity: 140mAh / 0.52Wh Size : 24.50 x 14.80 x 5.20mm VINTRONS Brand High Quality Replacement Battery