Customer Reviews
  1. About Us
  2. Contact Us
  3. Find an Installer
  4. Sell Us Your Equipment
  5. Questions?  Call 800-929-8061 or 248-288-7000
Accessories

Audio and Video Conferencing

Avaya Aura

Avaya Definity

Avaya IP Office

Avaya Merlin

Avaya Partner

Barcode Scanners

Cisco

Digium

Grandstream

Headset Solutions

IP Phones and Devices By Hosted Service

Mitel

Nortel

Paging Solutions and Door Phones

Polycom (Poly)

Repair Service & Technical Support

ShoreTel

Single Line Phones

Ugly Boxes

Yealink



Polycom KIRK 4020/4040 Extended Battery (RB-4040-N)

Polycom KIRK 4020/4040 Extended Battery (RB-4040-N)


New: $27.00
Availability: In Stock
Manufacturer: Polycom   |   SKU: BAT-RB-4040-N

Condition 
Quantity
★   Rock Solid 1 Year Warranty   ★   30 Day Returns
★   Over 36 Years of Superior Sales, Service, and Support

KIRK 4020/4040 Extended Battery Features

  • Spare or replacement battery
  • Extended capacity
  • NiMH, 3.6v, 730 mAh (3 to 6 hours longer than standard 600 mAh battery)
  • High quality replacement battery - 100% compatible with OEM part number 84743411

Compatibility

  • Polycom KIRK 4020 and 4040 wireless handsets






Metroline, Inc.  •  2250 Meijer Drive  •  Troy, MI 48084 •  Phone: 800-929-8061 or 248-288-7000
Business Hours: Mon-Thurs 8:30 am to 6 pm, Fri 8:30 am to 5:30 pm EST
About Us  |  Contact Us  |  YouTube  |  Find an Installer  |  Warranty and Returns  |  Privacy Policy
© 2026 Metroline, Inc.
Metroline Inc. is an independent distributor of technology and telecommunications equipment. Metroline Inc. does not represent any manufacturer or its affiliates in any way. The company, product and service names used in this web site are for identification purposes only. All trademarks and registered trademarks are the property of their respective owners.