I’ll be straightforward: I by no means left them on for eight several hours inside a row, but I do know an individual with the WF-XM4s who sleeps with them in and advised me they might last an entire night – as well as the XM5 battery life is purportedly https://allhealthmarket.com/product/smart-wearables/smart-electronics-smart-wearables/headphones/b19-wireless-headphones-with-fm-radio-bluetooth-headset-stereo-microphone/