Artisan Power Avaya 9040 and 9631 Phone Replacement Extended Capacity Battery. 2150 mAh Avaya 9040 and 9631 Replacement Battery (Extended) Replaces Part Number: 108586553, 108272485, 3204-EBY, 32049 NiMH Rechargeable Battery Pack| 3.6 Volt | 2150 mAh | Cells Made in Japan | Includes Belt Clip Extended Capacity Battery: Slightly larger, thicker, and heavier than the standard capacity battery. Manufactured by Artisan Power, a leader in premium quality replacement battery packs.