I use Plantronics BackBeat GO 2 wireless ear buds. They claim up to 4.5 hours of listen time but I can get 2.5 hours before the low battery warning happens and then I can get maybe another 45 mins sometimes an hour of of them before they shut off. However, the charge fairly fast, even from a portable pack like my Mophie which is light enough I can take on my rides and charge during a long break. Otherwise they last the entirety of a 22 mile no-drop ride with 5 regroups and my to/from time and the time I am waiting for the ride to start.