Polycom SoundStation 2 and 2W Replacement Battery (Standard Capacity) Fully replaces battery number 2200-07803-002 and 2200-07803-003 Lithium Ion Rechargeable Battery Pack 7.4 Volt Cells Made in Japan 2600 mAh Capacity Rating (18% higher than the OEM batteries.) Manufactured by Artisan Power, a leader in premium quality replacement battery packs. Check out our extended capacity battery for an even longer lasting battery. http://www.amazon.com/dp/B00BCQ233S