JBL Boombox speaker along with included charger and user documents.

How to Charge JBL Boombox Bluetooth Speaker

Here we explain how to charge / recharge the JBL Boombox portable BT speaker for fast recharging by way of its hidden DC input charging port in the back of the unit, discussed below.

Summary of How to Charge the JBL Boombox Bluetooth Speaker

In short, first, we suggest that you recharge the Boombox with the included charger from JBL. Why? Because this charger meets the speaker’s electrical needs and is in fact, as verified by JBL.  Indeed, JBL must feel that this is a well-matched charger since they include it with the speaker.  So, we would not use any cheaper grade charger here.  But we admit that in a pinch, you could recharge the speaker with other non JBL wall chargers.  But we won’t detail those options here.





It’s time to charge the Boombox when the battery status meter shows a single flashing red light.

When you see that red lamp, connect the black barrel DC output jack included with the speaker between the speaker and that AC adapter. Then, plug the adapter into a working wall outlet to recharge the JBL Boombox to full.





Finally after six and a half hours, your JBL Boombox fully recharges. Then, you’ll be able to play it again for roughly 24 hours before you have to charge it again.

How to Charge the JBL Boombox Speaker, Step-by-Step

1. For Best Results, Use the Power Adapter Provided

As we said above, we use the JBL wall charger AC adapter included with the speaker, as shown next.

Top view of the JBL Boombox charger and AC cord.
JBL Boombox charger and AC cord, top view.

2. Open the Port Cover on the Speaker

Find the connections port door on the back of the Boombox as shown next.

Rear view of the JBL Boombox speaker, showing the closed port cover door.
JBL Boombox speaker, back view, showing the closed port cover door.

Pry open the port cover, pulling the door out toward you and then down. This exposes the DC input charging port inside, as shown next.

Rear view of the JBL Boombox BT speaker, showing the DC input barrel style port.
JBL Boombox BT speaker, back view, showing the DC input barrel style port.

3. Plug in the DC Power Cord to Continue with How to Charge the JBL Boombox





Then, plug the barrel male end of the wall adapter’s charge cord into the matching DC input port on the speaker, as shown next.

Rear view of the JBL Boombox, showing the charger cord connected to the DC input port on this speaker.
JBL Boombox back view, showing the charger cord connected to the DC input port on this speaker.

4. Plug the AC Power Adapter into a Working Wall Outlet

Now that the Boombox and the JBL AC adapter are connected, we plug the charger into a working AC outlet, as shown next.

The speaker, all connected up and, recharging.
The speaker, all connected up and, recharging.

At least one of the battery status lamps lights up on the Boombox when you apply DC input power. There are five lamps on this speaker that light in succession as internal battery charging progresses.

5. Allow the JBL Boombox to Charge Until All Battery Power Lights Go Out

Battery recharge is almost done when all but the last of the battery gauge lamps glow solid. The last one keeps blinking for several minutes more to top off the charge, as shown next.

Front view of this BT speaker, showing the battery level gauge, which is reading full charge in this picture.
Front view of this BT speaker, showing the battery level gauge, which is reading full charge in this picture.

The battery charge cycle wraps up when all battery status gauge lights go off, as shown next.

Front view of the speaker, showing the all-dark battery level gauge.
Front of the speaker, showing the all-dark battery level gauge.

6. Unplug the DC Charging Cable from the Wall Outlet and Speaker to Continue with How to Charge JBL Boombox





7. Fully Close the Port Door

Note that unless this power port opening flap is  tightly shut and thus, a good seal made, water could seep into the connector ports area. Then, this could likely damage the speaker inside. Thus take special care to properly seat the port door, to get full water resistance protection while not charging.

See how this port door looks when fully closed and sealed in the next picture.

Rear view of the speaker, showing the closed port cover door.
The speaker back view, showing the closed port cover door.

8. Done with How to Charge the JBL Boombox !

We have now fully charged our BT speaker. Note that the battery charge meter just after turning on the Boombox after a full recharge. All lamps glow, meaning that the battery is now in full charge state, as shown in the next picture.

Repeat recharging every twenty-four hours of music play, to keep the battery in good shape. In fact, we charge ours when the battery status gauge lights show just one lamp glowing, and we do so right away.





Frequently Asked Questions (FAQ) for How to Charge JBL Boombox

Why Does my JBL Xtreme Keep Shutting Down ?

An aging speaker battery may cause this, since the battery can no longer deliver the minimum current the Boombox needs to work correctly.  So replacing the battery often fixes this issue.  We recommend though, that you check with a qualified technician to install a new battery.

What’s the JBL Boombox Charge Time?

The Boombox fully recharges in between six and seven hours, depending on the state of the battery when charging starts. This assumes that you use the charger that comes with the speaker.  Other wall chargers may take longer to fully recharge this unit.

Can you charge JBL Boombox with USB?

No you cannot, and further, such attempts could destroy the speaker innards.

Related Posts to How to Charge JBL Boombox

  1. How to Charge JBL Go 3 Bluetooth Speaker
  2. How to Charge Ultimate Ears Wonderboom BT Speaker
  3. Recharging the JBL Clip 3 Mini Speaker
  4. How to Charge JBL Go 2 Portable Speaker
  5. How to Charge JBL Flip 3 Bluetooth Speaker




Other Posts About the JBL Boombox Power Bank Speaker

  1. How to Adjust Volume on JBL Boombox Speaker
  2. Finding JBL Boombox Firmware Version
  3. JBL Boombox Charge Time, How Long to Fully Charge
  4. How to Check JBL Boombox Battery Life
  5. JBL Boombox Speaker Specs and Features

References for JBL Boombox Charging Instructions

  1. JBL Boombox Splash Proof Bluetooth Speaker Product Page, on JBL.com

Revision History

  • 2021-07-31: First published.
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