Finally solved the problem of my PXC 550 randomly turning off and on : r/sennheiser
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PXC 550-II
Sennheiser PXC 550 Replacement Battery: BatteryClerk.com
Amazon.com: Sennheiser PXC 550 Wireless – NoiseGard Adaptive Noise Cancelling, Bluetooth Headphone with Touch Sensitive Control and 30-Hour Battery Life : Electronics
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Customer Reviews: Sennheiser PXC 550 Wireless Noise-canceling Bluetooth® headphones at Crutchfield
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Sennheiser PXC 550 Replacement Battery: BatteryClerk.com
Sennheiser PXC 550-II: Bose and Sony rival gets upgraded - CNET
Battery AHB413645PCT For Sennheiser PXC 550 Bluetooth Headset | eBay
Amazon.com: 1000mAh Replacement Battery for Sennheiser PXC 550 II Noise Cancelling Wireless Bluetooth Headphones : Electronics
Sennheiser PXC 550-II review: Great sound and ANC - SoundGuys
