Plantronics 64399-03 Headset Battery - For Headset - Battery Rechargeable - 190 mAh - 3.8 V DC

Takes lesser time to charge, compared to others 3.8 V DC battery - Ensures a steady and uninterrupted supply to your headset Helps you keep your headset ready to use anytime Rechargeable battery - Lasts longer on a single charge than its disposable counterparts