Lithium-polymer chemistry; 3.7V of power; up to 6-month shelf life

Ensure your device maintains its expected talk time and range with this multipack of lithium-polymer UltraLast cordless headset replacement batteries. The reliable construction meets or exceeds the original manufacturer's specifications, so you experience like-new performance. These 230 mAh UltraLast cordless headset replacement batteries are rechargeable and accommodate select Plantronics models for seamless installation and functionality.