Artisan Power Polycom SoundStation 2 and 2W Replacement Battery (Extended Capacity) Polycom SoundStation 2 and 2W Replacement Battery (Extended Capacity) Fully replaces battery number 2200-07804-002 and 2200-07804-003 Lithium Ion Rechargeable Battery Pack | 7.4 Volt | Cells Made in Japan | 5200 mAh Capacity Rating Longer Lasting: 5200 mAh capacity rating 18% higher than the OEM batteries. Manufactured by Artisan Power, a leader in premium quality replacement battery packs.