I’ll be truthful: I in no way still left them on for eight hours in the row, but I do know an individual with the WF-XM4s who sleeps with them in and advised me they would last an entire night – as well as the XM5 battery life is purportedly https://allhealthmarket.com/product/smart-wearables/smart-electronics-smart-wearables/headsets/original-lenovo-gm2-pro-5-3-earphone-bluetooth-wireless-gaming-earbuds-headsets-headphones-hd-call-dual-mode-gaming-headset-with-mic/