Most Bluetooth speakers, including the JBL Charge 3, offer off-grid operation via an internal battery. And when that portable power goes dead, you can recharge it via an AC or car adapter. To facilitate recharging, you can use a USB 2 charger that delivers 5 volts at 2.3 amps. Sometimes though, the JBL Charge 3 … Continue reading JBL Charge 3 Won’t Charge