The Sony SRS XB21 Charging Indicator is an LED in the rear button / port panel on the speaker. Find…
How to tell if Sony SRS XB21 wireless Bluetooth speaker is charging? This desktop speaker has an orange LED light…
Most JBL Bluetooth speakers, including the XB21, offer truly portable operation via their lithium ion batteries inside. And when said…
This piece gives Sony SRS XB21 speaker charging instructions. Recharge this speaker easily through the micro USB DC power input…