About six weeks ago, I bought new WH-XM4 headphones. These are now faulty and have been returned for repair. When I received the new XM4s, I charged my old XM3s and stored them in their case. They have been sat in the case during the six weeks I've been using the XM4s and, as the new headphones have been returned, I am now using the XM3s again. The funny thing is although they've been stored for six weeks and I've had them on for about 16 hours, the battery still says "fully charged".
When I was using them before, I used to lose about 10% of the battery every night and now after four nights they're still fully charged. Most strange.
The XM4s were returned due to the volume getting lower and lower almost every day. To the point where I was turning the volume fully up. Never been as good as my XM3s at noise cancelling and even the control buttons were quite rough on the edges.
