Bose QuietComfort 'Battery Low, Please Charge Now'

What it means

Bose QuietComfort 'Battery low, please charge now' is the critical-battery voice prompt documented on Bose's own support pages (bose.com/support).
Bose's exact wording: 'Battery low, please charge now.'
It's not a fault — it's a warning that the battery has dropped to the bottom few percent and the headset will auto-shutdown soon if you don't charge.
You typically have 10-20 minutes of remaining listening time after the prompt, depending on volume and noise-cancellation use.

Affected Models

Bose QuietComfort (every recent generation)
Bose QuietComfort Ultra Headphones
Bose QuietComfort Ultra Earbuds
Bose QuietComfort 45 Headphones
Bose QuietComfort Earbuds (1st gen and II)
Same or very similar prompt on Bose SoundLink and other Bose Bluetooth devices

Common Causes

Headset wasn't charged for an extended period
Long noise-cancelling session — NC mode uses noticeably more battery
Headset was left powered on in a bag without auto-off enabled
Battery has aged — older units hold less charge per cycle
Voice prompts at full volume make 'Battery low' sound urgent even on a 5-10% remaining battery

How to Fix It

Plug in to charge.

Connect the USB-C cable (or Lightning on older models) to a USB-C power source.
The QuietComfort headphones charge in roughly 3 hours from empty.
Even 15 minutes of charging gets you a few hours of usable battery if you need to keep listening.
Carry on briefly if you need to finish what you're doing.

After 'Battery low, please charge now', you typically have 10-20 minutes of remaining battery.
Lower the volume and turn off noise cancelling (if acceptable) to extend that window — both ANC and high volume drain the battery faster.
Check battery level after charging.

Power the headset on after charging.
Bose announces the battery level on power-on if voice prompts are enabled — exact wording varies by model.
The Bose Music app also shows the current percentage on its main screen once the headset is connected.
If you don't hear any battery announcement at power-on, voice prompts are disabled — enable them in the Bose app > Settings > Voice Prompts.
Disable the battery-on prompt if it's too loud.

Bose plays the battery-on prompt at the system volume — and at full volume that can be jarring.
Open the Bose app > Settings > Voice Prompts > toggle off the battery announcement specifically (you can keep other voice prompts on).
Or lower the system volume before powering on the headset.
Use auto-off to prevent future battery-low surprises.

Bose Music app > Settings > Auto-off.
Set the headset to power off after 20 or 30 minutes of inactivity.
This stops the battery from being drained when the headset is in a bag — the single biggest cause of unexpected 'Battery low' announcements.
Consider Bose battery service for an aged headset.

If your QuietComfort is several years old and only gets a few hours per full charge, the battery has degraded below useful capacity.
Bose's customer support can quote a battery replacement for current QuietComfort generations.
Older models (QC35, QC25) typically aren't economical to service — many owners switch to a current generation at that point.

When to Call a Professional

'Battery low, please charge now' never needs Bose service.
If a fully-charged Bose QuietComfort now lasts only a fraction of the rated runtime, the battery has degraded — Bose's repair service can address that, but most owners replace the headset at that point.

Frequently Asked Questions

Will Bose stop announcing 'Battery low, please charge now' if I just turn off all voice prompts?

Yes — if you disable voice prompts in the Bose Music app (Settings > Voice Prompts > off), 'Battery low, please charge now' stops being announced as speech.
You may still get a low-battery tone instead of the spoken phrase, but it's much less intrusive.
The trade-off: you also lose helpful spoken prompts like 'Bluetooth connected' and the battery-level announcement at power-on.
Most owners leave voice prompts on overall — the battery-low warning is genuinely useful when you're trying to keep listening as long as possible.