Sennheiser PXC 550-II: Bose and Sony rival gets upgraded - CNET
Sennheiser PXC 550 Wireless review | What Hi-Fi?
Sennheiser PXC 550-II Review: Intelligent Audio On The Move
Sennheiser PXC 550 Wireless NoiseGard Adaptive Noise Cancelling, Bluetooth Headphone with Touch Sensitive Control and 30-Hour Battery Life - Black: Amazon.co.uk: Electronics & Photo
I recently bought PXC 550 ii, this is the second time I charge it, it's been more than three hours already and the third led is still blinking (internet says full charge