Front left view of the Sony SRS XB33 speaker.

Sony SRS XB33 Battery Indicator, Charging Light

The Sony SRS XB33 Bluetooth speaker has a simple battery level indicator LED on the top button panel, just below the Power pushbutton, as shown in the pictures that follow.  This tells battery status. E.g. Whether it’s draining or charging, or whether it’s critically low or not when discharging.  But it does not show charging progress, or exactly how full the battery is at a given time. But it does blink orange in short but widely spaced pulses, when the battery hits close-to-dead status. In this post, we discuss how to read this battery indicator LED on the XB 33 speaker.

Note that to obtain a better reading of battery percentage, see below.

How to Read the Sony SRS XB33 Battery  Indicator Light

1. The Lamp is Dark 

The battery indicator lamp (Sony labels this as the CHARGE lamp) is dark in the following scenarios:

  1. When you shut down the XB33, and you have no charger connected.
  2. When the charger IS connected but the battery finished charging to full, as shown next.
  3. And finally, this light is OFF when the speaker itself is powered ON, but the battery has more charge left than a critically low amount. This light is dark as long as the battery does not yet need charging.
Picture of The dark -CHARGE- light on the Sony SRS XB33 speaker.
The dark -CHARGE- lamp on the Sony SRS XB33 speaker.

2. The Sony SRS XB33 Battery Indicator Flashes Orange

With the charger unplugged, the XB33 powered ON, and the battery having very low power left, this LED begins blinking orange.  The means that the speaker will shorty cut off due to a dying battery, and so, you should put it on the charge soon to avoid play interruption.





3. This LED Also Works as a Charging Indicator

This orange LED also lights steadily (no blinking) as the 33 recharges, as we see in the next picture.  On this unit, the light glowing is the only visual means of knowing that charging is happening.  But it does not show how far along the recharging is, until the light actually turns OFF.

The glowing battery status lamp.
The battery status LED lit up.

Also note that this light should never flash on and off during recharging the speaker.  If you see this, then either your power adapter is not delivering enough (or any) electricity, your USB cord is damaged, or you have something broken inside the speaker itself.

4. When the Light Goes Dark While Charging, Then Recharging is Done

As speaker charging advances, the light stays steadily lit. No blinking. But after a few hours, battery charging finishes, and the lamp goes OFF to show this.  It goes dark in this case whether the speaker itself is ON or OFF. Note that the light turns OFF as well, if you disconnect the charger before the charge cycle completes.

5. The Sony SRS XB33 Battery Indicator Is Not a Charge Remaining Meter

When unplugged from the charger, this light becomes the battery charge left indicator.  Well something like that.  I.e. If it is dark when the speaker is ON, then the battery has some play time left, although you cannot tell how much. If it flashes though, then you can deduce that the battery is just about to run dead.

Reading Battery Percentage

However, on the XB33, you can also get a more accurate reading on the percentage of battery charge left, besides just by reading the battery indicator lamp.

Picture of the battery percent full announcement button.
The battery percent full announcement button.

For that, just press and release the LIGHT-BATT button in the rear button and port compartment, just above and to the right of the USB-C input port. This makes the speaker announce the power left in the battery as a percentage value, and it speaks this in a female voice.

That’s the gist it.

Related Posts to Sony SRS XB33 Battery Indicator

  1. Sony SRS XB32 Battery Indicator
  2. How to Read the Battery Indicator on the Sony SRS XB31 Wireless Speaker
  3. Sony SRS XB23 Battery Indicator Explained
  4. The Battery Indicator on the Sony SRS XB22 Speaker Discussed
  5. Sony SRS XB21 Battery Indicator Discussed

Other Posts About the Sony SRS XB33 Stereo Bluetooth Speaker

  1. How to Connect Sony SRS XB33 to iPhone
  2. Sony SRS XB33 Speaker Buttons Explained
  3. How to Turn Off the Sony SRS XB33
  4. How to Turn Off the Party Lights on the Sony SRS XB33 Speaker
  5. Telling if the Sony SRS XB33 is Charging

References for Sony SRS XB33 Battery Level Indicator

  1. Sony SRS XB 33 Speaker Official Product Page at Sony.com

Revision History

  • 2021-10-14: First published.
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