Picture of the front of the original carton packaging for the Sony SRS XG300 speaker.

Sony SRS XG300 Charging

This piece explains Sony SRS XG300 portable boombox speaker charging. Do this easily through the USB-C DC input port, behind the water resistant door, as we’ll show in the pictures below.

Note that you can still play this speaker while it charges, without raising the recharge time much.

Sony SRS XG300 Charging: Summary

    1. In summary: First, the unit comes with a suitable charger.  So use this one if you can.  But if you lose yours, then be sure to pick a strong enough adapter.  This particular speaker requires 15 watts (5 volts at 3 amps) for fastest recharging.
    2. Next, connect the DC end of the charger to the speaker and plug the other end into a working AC outlet
    3. Then after three or so hours, the XG300 finishes charging.  So it’s ready to play once more for up to twenty-five (25) hours before needing another recharge.

Sony SRS XG300 Charging: Step by Step

1. Choose Correct Size AC or Car Adapter

The charger you use should be a USB-C charger that provides 5 volts at 3 amps (15 watts).  Here, we use the adapter that Sony includes with this speaker.

2. Open the Port Cover

Use a fingernail, dime, penny, or small screwdriver to work open the waterproof seal port cover on the XG300. See the closed power port door in the next picture.  Be careful not to scratch the delicate seal around the inside edge of this door.

Picture of the ports door tightly closed on the Sony SRS XG300 wireless speaker.
The ports door tightly closed on the Sony SRS XG300 wireless speaker.

Prying open this door exposes the USB-C charging port inside, as shown next, pointed at by the green arrow.

Picture of the ports door held open on the Sony SRS XG300 boombox speaker.
The ports door held open on the Sony SRS XG300 boombox speaker.

3. Power OFF the Unit to Continue with Sony SRS XG300 Charging

Note that the SRSXG300 still charges when powered ON.  But depending on how much extra recharging juice your power supply offers, the speaker might charge a bit faster when turned OFF.

4. Plug the Charger’s DC Cable into the Speaker

Then, plug the matching end of that cord into the port, as seen in the next shot.

Picture of a USB-C power cord inserted into the speaker.
A USB-C power cable inserted into the speaker.

Warning: Only use the USB-C input port for charging the speaker.  Do not use the USB-A port, as this is for for power output-only use for charging phones.  So, feeding power into this port will not only fail to recharge the 300, but this could also damage the electronics inside the speaker.

6. Plug the Power Supply into a Working Wall Receptacle

Now that we connect the 300 and our adapter, we then plug the mains end of the adapter into a working AC outlet, as we see next. We plugged ours into a surge protecting power strip.

Picture of the Sony SRS XG300 boombox speaker charging.
The Sony SRS XG300 boombox speaker charging.

The CHARGE lamp lights up solid orange on the speaker. And while no battery status gauge shows percentage of charge, the glowing lamp means that charging is occurring, as we see next.

Picture of the orange CHARGE indicator light.
The CHARGE indicator lamp glowing orange.

7. Let the XG 300 Charge Until the CHARGE Light Goes Dark

Full battery charging is finished when the CHARGE lamp in the speaker’s top button panel shuts off, as shown next.

Picture of the dark CHARGE indicator lamp on the Sony SRS XG300 speaker.
The dark CHARGE indicator light on the Sony SRS XG300 speaker.

8. Unplug the Charging Cable from the Speaker

9. Fully Close the Port Door / Cap

Note that unless you seat the port cap securely, water may soak the ports behind it. And, since water and electronics generally do not work well together, getting these connectors wet might damage their sensitive contacts. So be sure to press this door closed with enough force to fully seat it, for maximum moisture protection.

Picture of the back of the boombox speaker.
Rear view of the boombox speaker.

10. Done with Sony SRS XG300 Charging

We have now fully charged our XG300.

Finally, repeat this recharging every twenty-five hours of play, to keep the battery in top condition for years to come. Or if you do not use the speaker for a long time, at least top off the battery charge every six months or so.

Other Posts About the Sony SRS XG300

    1. How to Tell if Sony SRS XG300 Speaker is Charging
    2. How to Connect to Sony SRS XG300 Boombox BT Speaker
    3. Connecting to the Sony SRS XE300 Wireless Speaker
    4. How to Factory Reset Sony SRS XE300 Bluetooth Speaker
    5. How to Make Sony SRS XE300 Portable Speaker Discoverable

Related Posts to Sony SRS XG300 Charging

    1. Sony SRS XB40 Charging
    2. Sony SRS XB30 Charging Tips
    3. Charging the Sony SRS XE300
    4. Sony SRS XE200 Charging Help
    5. Sony SRS X3 Charging


    1. Sony SRS XG300 Product Page at Sony.com

Revision History

    • 2022-10-12: First published.