VINTRONS, 140mAh Battery for Plantronics CS540, 86180-01, CS540A, Savi CS540, Savi CS540A VINTRONS, 86180-01, 84479-01 Battery for Plantronics CS540, C054 Wireless Headset; For Battery Number: 86180-01, 84479-01; Voltage: 3.7V; Capacity: 140mAh; Type: Li-Polymer; Dimension (around): 22.00 x 14.50 x 5.20mm.