Synergy Digital Wireless Headset Battery, Compatible with Savi W740 Wireless Headset, (Li-Pol, 3.7V, 140 mAh) Ultra High Capacity, Compatible with 82742-01 Battery - BF489664

• High-Quality Batteries: Bring your Plantronics Wireless Headset Systems back to life with these replacement batteries from Synergy Digital. This Combo Pack is a great choice to ensure uninterrupted wireless headset communication. Rechargeable Design: Don’t miss a call, webinar or video conference again. Synergy Digital’s 82742-01, 84598-01, 204755-01 Battery Combo Pack Compatible for Plantronics Systems automatically recharges when your headset is in the charging cradle. Superior Performance: Made of Lithium Polymer, each 3.7 volt, 140mAh battery will last all day so you can keep your headset by your side at all times. Simply place it back in the charging cradle when leaving the house or office, or retiring for the night. Long-Lasting Use: Each Ultra Hi-Capacity EM-CPP-547 Battery is made with high-quality Japanese cells to ensure long-lasting use. In fact, Lithium Polymer batteries have over a 20% higher energy density than Lithium-Ion batteries.