POLY CA22CD Wireless Spare Battery (218401-01):

• Replacement Battery CA22CD
• Single Channel & Dual Channel
• OLD Plantronics Part #: 218401-01
• Up to 10 hours of continuous talk time.
• Poly CA22CD Replacement Battery 218401-01. Compatible with Poly CA22CD-SC 217100-01 and Poly CA22CD-DC.
  
• TECH TIP: Battery packs with 4 contacts are only compatible with CA22CD models. (Battery packs with 2 contacts are only compatible with CA12CD models.)
  
• These will NOT work on their CA12CD-S Wireless, its for the new models CA22CD's,

**HP REPLACEMENT IS NOW THE PART #8K6Q8AA#AC3