2 Pack - Bose QuietComfort 3 Battery for Bose Headphones Battery Replacement (180mAh, 3.7V, Lithium-Ion) - Compatible with Bose 40229, Bose NTA2358, Bose QC3, Bose QuietComfort 3 Bose Headphones Battery Replacement Bose 40229, Bose NTA2358, Bose QC3, Bose QuietComfort 3 Battery Capacity: 180mAh, Voltage: 3.7, Type: Lithium-Ion Lifetime Warranty On Sale for a Limited Time! Grade A Quality. High Capacity.