You charge JBL Charge 4 Bluetooth speakers conveniently via the USB-C charge port, and to get the shortest charge time and fullest charge when the Charge 4 runs dead, use a large enough USB-C power adapter. JBL Charge 4 Charge Time: How Long to Fully Recharge This Speaker According to the specs for this speaker … Continue reading JBL Charge 4 Charge Time to Fully Recharge