Picture of the Ultimate Ears UE Wonderboom Bluetooth speaker, front view.

Wonderboom Speaker Not Charging, How to Fix

Most Ultimate Ears Bluetooth speakers, including the Wonderboom, offer truly portable operation via their lithium ion batteries inside. And when said battery dies, you can recharge the speaker with an AC or car adapter. Sometimes though, you may notice that the Wonderboom speaker is not charging fully, or at all, even when you connect the adapter to power, and then to the speaker.  To solve that, we’re here to help.

How to Tell that the Wonderboom Speaker is Not Charging

Among the ways you can tell that the Wonderboom is not charging, is by reading the battery status lamp on the top of the speaker in the Power button.  Now this light changes from white and begins pulsing red during play, to alert you that the battery is running low on power.

However, there’s a problem if this blinking keeps going, even when you attach the charger.  Why?  Because the lamp should change at this point, to a soft flashing white, when you apply charging power.  But if it keeps blinking red, then correct recharging is likely not happening.

You can also feel the adapter’s surfaces ten or fifteen minutes into the charge cycle.  At that time, it should feel slightly warm.  But if you detect no warmth, then again, the Wonderboom is likely not charging.

Moreover, the status light normally shows battery recharging status.  I.e. As long as charging continues, this lamp also continues a slowly waxing and waning dim to bright and bright to dim white light.  And, as mentioned, this light either changes to solid white or goes out when charging completes.  But if that lamp continues the recharge pulse pattern after several hours of recharging, then chances are, charging is not going well.

Thus when you notice that the speaker is not recharging, even though it should be, you’ll want to figure out what’s wrong and how to get it to charge again.  So in this post, we offer reasons why the Wonderboom speaker may not charge when you connect it to power.  Then we give tried and true fixes for this typical problem.

 Wonderboom Not Charging, Reasons and Fixes

As we stated earlier, it’s normal that the power status lamp pulses red when the battery inside is almost depleted of energy.  But again, the light should switch to a throbbing white light when you connect the speaker to the charger, and the charger to a power outlet, and battery recharging begins.

Picture of the Wonderboom speaker front top view, with the -Power- button flashing red and highlighted.
Wonderboom speaker front top view, with the -Power- button blinking red and highlighted.

Normally though, this lamp only glows or flashes white.  It can look as follows.

Picture of the speaker powered ON, showing the top view, with the white glowing -Power- button circled.
The speaker powered ON, showing the top view, with the white glowing -Power- button circled.

Or, if the speaker is OFF when charging starts, and you don’t turn it ON during charging, then once recharging finishes, the status light in the Power button goes dark. See this in the next picture.

Picture of the UE Wonderboom speaker powered OFF, top view, showing the -Power- button circled.
UE Wonderboom speaker powered OFF, top view, showing the -Power- button circled.

If the light does not change to the throbbing white pulsating pattern when you plug the charger into the speaker, then several things might cause this. We list these below thus.

1.The AC Outlet May Not Have Voltage

The Problem

The AC or car adapter for the Wonderboom may not output any power due to not receiving any to begin with. This can happen in a defective AC or car circuit, tripped breaker, blown fuse, faulty wiring, power failure, and the like.

The Fix

Check that your receptacle has electricity by plugging in a test light or other device.  Then, reset circuit breakers if tripped. Also, if the outlet has a light switch that controls it, then be certain that that switch is in the ON position.  Or, simply try a different outlet.

2. The AC Adapter is Broken

The Problem

The Wonderboom not charging can also happen because the adapter is providing SOME but not FULL amperage to recharge the speaker all the way, even though its getting the correct power input from the outlet.

Now as adapters age, their output energy can fall over time. So this power supply might not deliver the correct amount if it is very old.   Thus you may see the lamp do the pulsing recharge pattern, but never turn back to solid white or never go dark. Please note that this speaker needs 0.5 amps at 5 volts from the adapter to fully recharge in the specified time of 2.6 hours.  However, charging will likely not go as fast as we hope if the charger does not deliver on these requirements.

Picture of the Wonderboom Ultimate Ears speaker charging, showing its -Power- button glowing and highlighted.
Wonderboom Ultimate Ears speaker charging, showing its -Power- button glowing and highlighted.

The Fix

The solution is to replace the adapter, preferably one that has a USB-A plug and delivers the maximum 5 volts at 0.5 amps (2.5 watts). Most common USB power supplies meet these power requirements… even the very cheap ones.

3. The Battery in the Wonderboom is Faulty

The Problem

As lithium ion batteries age, they lose their ability to fully recharge, and the characteristics of the charging current they draw, changes as they get older.  Normally, as a battery charges, it draws less and less charge current as it fills. But in the case of cell failure, it may draw too many or too few amps, thus confusing the charging circuits into behaving like no charging is occurring.  So the status lamp shows that charging is not happening, either by never stopping its pulsating white charging pattern,  or never starting that pattern in the first place.

The Fix

To repair this, replace the battery. But realize that you can’t easily get the old one out of the Wonderboom speaker. Indeed, changing the battery means that you must take this unit apart, and this is an intricate task.

Also note that doing this likely breaks the moisture seal.  So the Wonderboom will no longer be safe to use, should you expose it to water afterwards.

Breaking this seal may alter the sound quality as well. So get someone to replace the battery who knows how to pick the right replacement. They should also be able to restore the seal to as it was, as they reassemble the speaker. A good battery should fit well inside the speaker. But we suggest using only JBL certified batteries for this particular speaker.

4. The Speaker Might be Defective when the Wonderboom Speaker Is Not Charging

The Problem

Even if you have the proper power supply, with a working battery in the speaker, the charging current that actually gets to the battery may be too low or too high.  This can occur when the battery management circuits inside the Wonderboom fail.  Note that these systems read the battery status, and switch off the charging current when they deem the battery full.

But when they go haywire, the battery might see no power at all though the charger itself is fine.  Thus, the speaker never charges.  Again, in this case, the status lamp might never stop blinking, even with the charger connected. You may also see that the speaker doesn’t play as long before dying, if at all, until you connect the charger. Or it might not play at all.

The Fix

The best answer here, is simply to get a new Wonderboom.  Why?  Because the electronics in this unit are quite small.  So unless you can replace the system board(s) yourself, or know someone who will do it for you, just buy another speaker to save a bunch of aggravation.

Related Posts to Wonderboom Speaker Not Charging

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  2. JBL Xtreme Not Charging, How to Repair
  3. Charge 4 Speaker Not Charging, How to Fix
  4. JBL Charge 3 Not Charging, How to Fix
  5. How to Solve JBL Xtreme 2 Not Charging Problem

Other Posts About the Wonderboom Speaker

  1. Connecting to the Wonderboom Speaker
  2. How to Turn Off the Wonderboom Bluetooth Speaker
  3. How to Turn On Wonderboom Wireless Speaker
  4. Put the Wonderboom into Pairing Mode
  5. How to Connect 2 Wonderboom Speakers

References for Wonderboom Not Charging

  1. Wonderboom Speaker Frequently Asked Questions (FAQ) Page at UltimateEars.com
  2. Where to Buy the Wonderboom 1 Speaker

Revision History

  • 2022-08-01: First posted.