Battery capacity 240mAh, at full volume for about 9.5-10 hours Having bought them, I thought that, like other more or less decent headphones, it takes time to “play out”, I was wrong, a week later, in my case it’s a 30 + 30 minute drive to work at medium volume and 9 hours of lying in a box paired with a phone at full volume , had no effect. It's a pity, I expected more from Sony. From Sony, my wife has wired headphones, their price is 650, they play better. At the moment I have wireless Philips SHB5850, wired Sennheiser CX 200, Sennheiser CX 1.00, Panasonic RP-HJE125E-A (this is what I have to compare with) EVERYTHING, except for Panasonics (but their price is 8 frames below), play better than Sony WI-C400 I also use a headset, they seem to hear me normally (there were no special complaints) I think that I wasted my money in vain, since I personally don’t like the sound from these headphones.
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