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- Output Volts: 3.7V
- CE Approved and Safety Assured
- 🌳CUSTOMER SATISFACTION: We are certain that using our replacement Battery for Bose QuietComfort 3, QC3, NTA2358, 40229 Headphones, you will improve the the life of your device. Because you are our number 1 priority, we are offering premium customer support and a 30-day money-back guarantee for a risk-free purchase.