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Amazon.com: Artisan Power - Replacement Battery for Cisco 8821 and 8821-EX Phones - 2100 mAh Replacement Phone Battery for Cisco 8821 Unified Color Wireless VOIP Phone - Replacement Battery for CP Batt 8821 : Electronics
Cisco Multi-Charger battery charger / charging stand - + AC power adapter - CP-MCHGR-8821= - Phone Accessories - CDW.com
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