A decent JBL Wonderboom Speaker speaker charger is a USB AC charger that supplies at least 2.1 amps at 5 volts (12 watts or more). Note that currently, Ultimate Ears does not provide a compatible USB charger with its JBL Wonderboom Speaker speaker. So, you’ll need to buy one elsewhere. These usually cost between ten … Continue reading JBL Wonderboom Speaker Charger