Front view of the Sony SRS XG300 party boombox.
This piece covers how to charge Sony XG300 portable boombox speaker. Do this easily through the USB-C DC input port. So find it behind the water resistant door, as we show in the pictures below.
Note that you can still play this speaker while it charges, without raising the recharge time much.
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.
Next, connect the DC end of the charger to the speaker. Then plug the other end into a working AC outlet.
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.
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.
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.
Prying open this door exposes the USB-C charging port inside, as shown next, pointed at by the green arrow.
Note that the XG300 still charges when powered ON. So the speaker might charge a bit faster when turned OFF. But how much charging slows when it is ON, depends on how much extra juice your charger offers.
Then, plug the matching end of that cord into the port, as seen in the next shot.
Warning: Only use the USB-C input port for charging the speaker. Do not use the USB-A ports, as this is for for power output only or thumb drive use. So, feeding power into this USB-A port will not only fail to recharge the 300. But this could also damage the electronics inside.
We then plug the mains end of the adapter into a working AC outlet. We connect ours to a surge protecting power strip.
The CHARGE lamp lights up solid orange on the speaker. True that there is no visual battery status gauge that shows percentage of charge. Yet the orange glowing lamp does tell that charging is occurring.
Full battery charging is complete when the CHARGE lamp in the speaker’s top button panel shuts off, as shown next.
Note that unless you seat the port cap securely, water may soak the ports behind it. Indeed, water and electronics generally do not work well together. So getting water on these connectors might damage their sensitive contacts. Thus be sure to press this door closed with enough force to fully seat it, for maximum moisture protection.
At last, 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 you may not use the speaker for a long time. But at least top off the battery charge every six months or so in that case.
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