Cisco CP-BATT-8821 Standard Replacement Battery — 3rd Party, New

Keep your Cisco 8821 Wireless IP Phone powered throughout the workday with this high-quality 3rd party replacement battery. Designed as a direct drop-in replacement for the OEM CP-BATT-8821, this lithium-ion battery delivers reliable performance at a fraction of the cost — backed by Reef Telecom's industry-leading 10-year warranty.

Key Specifications

• Part Number: CP-BATT-8821 (3rd Party Compatible)
• Battery Chemistry: Rechargeable Lithium-Ion
• Voltage: 4.35V (nominal) / 3.8V (minimum)
• Capacity: 2060mAh
• Talk Time: Up to 13 hours
• Standby Time: Up to 240 hours
• Charge Time: ~3 hours via power adapter or desktop charger
• Weight: 1.3 oz (37g)
• Condition: New (3rd Party)

Compatibility

• Cisco Wireless IP Phone 8821 (CP-8821-K9)
• Cisco Wireless IP Phone 8821-EX (CP-8821-EX-K9)

Why Buy from Reef Telecom?

• 10-Year Warranty on all products
• Free Shipping on orders over $300
• Trusted B2B telecom equipment supplier

This battery is ideal for enterprise environments including healthcare, manufacturing, retail, and warehousing where reliable wireless communication is critical. A cost-effective alternative to OEM, delivering the same performance and compatibility you need to keep your Cisco 8821 fleet running.

Free ground shipping on orders over $300. Same-day shipping on orders placed before 4PM EST.

All products include our industry-leading 10 Year Warranty backed by Reef Telecom.