Fix Anker Soundcore Infinity Battery Drain While Offline

Understanding the Unexpected Drain

When an Anker Soundcore Infinity sits idle, it is supposed to retain charge for weeks. If you notice the battery level dropping even while the speaker is offline, something is drawing power in the background. Identifying why the drop occurs is the first step toward a lasting fix.

Common Reasons for Offline Drain

• Residual Bluetooth pairing – Even when the device appears disconnected, a lingering Bluetooth link can keep the radio active.
• Faulty battery cells – Age or manufacturing defects can cause a cell to leak current.
• Firmware glitches – Software bugs sometimes prevent the power‑off routine from completing.
• External accessories – A damaged charging cable or protective case that presses the power button can trigger power draw.
• Environmental factors – Extreme temperatures accelerate self‑discharge in lithium‑ion cells.

Preparing Your Workspace

Before beginning any troubleshooting, gather the following items:

• A fresh micro‑USB or USB‑C charging cable (the one that came with the speaker is ideal)
• A soft, lint‑free cloth
• Access to a computer with internet connectivity for firmware updates
• A small Phillips screwdriver (optional, for deeper inspection)

Work on a clean, flat surface and make sure the speaker is turned off completely. Press and hold the power button for three seconds to confirm the LED is off.

Step‑by‑Step Guide to Stop Battery Drain

1. Perform a Full Power Cycle

1. Connect the speaker to a charger and let it reach 100 % charge.
2. Once fully charged, unplug the cable.
3. Press and hold the power button for ten seconds. This forces the device to reset its internal power management circuit.
4. Leave the speaker untouched for at least two hours in a cool, dry place.

If the battery still drops noticeably after this cycle, move on to the next step.

2. Update the Firmware

Outdated firmware can leave the power‑off routine incomplete, causing a hidden drain.

1. Visit Anker’s official support page and download the latest Soundcore Infinity firmware file.
2. Install the Anker Soundcore app on your smartphone or tablet.
3. Open the app, pair the speaker (even if you plan to keep it offline), and navigate to the “Firmware Update” section.
4. Follow the on‑screen prompts to apply the update. The speaker will reboot automatically.

After the update, disconnect the speaker from any Bluetooth device and observe the battery level over the next 24 hours.

3. Reset Bluetooth Pairings

A phantom pairing can keep the radio alive.

1. With the speaker powered on, press and hold the Bluetooth button for six seconds until you hear a confirmation tone. This clears all stored devices.
2. Turn the speaker off and store it in a place with no active Bluetooth signals (avoid close proximity to smartphones, laptops, or smart home hubs).

4. Inspect the Power Button

A sticky or partially engaged power button can draw current even when you think the unit is off.

1. Gently press the button several times to feel for any irregular resistance.
2. If you notice a click that feels loose or stuck, use the soft cloth to clean around the button area. A small amount of isopropyl alcohol on the cloth can help remove debris.
3. For persistent issues, use the small Phillips screwdriver to open the speaker’s bottom panel (refer to the service manual). Check the button contact and reseat it if needed.

5. Evaluate the Battery Health

If the speaker is older than two years, the battery may have degraded.

1. Charge the speaker to 100 % and then let it sit idle for 12 hours.
2. Record the remaining charge after this period.
3. Repeat the idle test after a full discharge (use the speaker until the battery hits the low‑battery warning, then let it rest for another 12 hours).

A consistent drop of more than 20 % within the idle time suggests a weakened battery that may need replacement.

6. Check the Charging Cable and Port

A defective cable can create a micro‑current leak.

1. Try a different, high‑quality cable and charger.
2. Inspect the charging port for bent pins or foreign objects.
3. Use the lint‑free cloth to clean any dust inside the port.

7. Store the Speaker Properly

Temperature extremes accelerate self‑discharge.

• Keep the speaker in a room‑temperature environment (15 °C to 25 °C) when not in use.
• Avoid leaving it in a hot car or near a heating vent.
• If you need long‑term storage (more than a month), charge the battery to about 50 % and then turn the unit off.

8. Perform a Deep Reset (Factory Reset)

If all previous steps fail, a factory reset can clear hidden settings that cause drain.

1. Turn the speaker on.
2. Press and hold the Power button and the Bluetooth button simultaneously for ten seconds.
3. Release both buttons when you hear a double tone. The speaker will announce a reset.
4. After the reset, do not pair it with any device. Let it sit offline and monitor the battery.

When to Consider Professional Help

• The battery level falls below 5 % within an hour of a full charge, despite completing the steps above.
• The speaker shows physical damage to the charging port or internal components.
• You detect a burning smell or excessive heat while the unit is idle.

In these cases, contact Anker support or a certified repair center. Replacement batteries are often available, but attempting a DIY swap without proper tools can void the warranty.

Frequently Asked Questions

Why does the speaker lose charge faster in cold weather?
Lithium‑ion cells experience increased internal resistance at low temperatures, which makes the voltage appear lower even though the actual capacity hasn’t changed dramatically.

Can I keep the speaker connected to a power bank to avoid drain?
While a constant power source prevents the battery from discharging, the speaker’s internal circuitry still cycles power for Bluetooth scanning, which can generate heat. Use this only as a temporary measure.

Does turning off Bluetooth on my phone stop the drain?
If the speaker is still paired, it may continue scanning for a connection. Clearing the pairing list on the speaker is more reliable.

Is it safe to use the speaker while it is charging?
Yes, the Soundcore Infinity is designed for simultaneous playback and charging. However, prolonged use while charging can keep the battery at high voltage, which may slightly reduce long‑term lifespan.

How often should I update the firmware?
Check the Anker app monthly. Firmware updates are released only a few times a year, so you’ll rarely need to act more often than that.

Preventive Maintenance Checklist

• Update firmware at least once every six months.
• Clean the charging port and power button quarterly.
• Store the speaker in a temperature‑controlled area when not in use.
• Perform a full charge‑discharge cycle every three months to keep the battery calibrated.
• Keep the speaker’s surface free of dust and moisture with a soft cloth.

Final Thoughts

Battery drain while the Anker Soundcore Infinity is offline is rarely a symptom of a catastrophic defect. More often, a combination of lingering Bluetooth connections, firmware quirks, or a simple physical obstruction is to blame. By following the systematic steps outlined above—power cycling, firmware updating, Bluetooth reset, button inspection, and proper storage—you can restore the speaker’s longevity and enjoy weeks of unplugged listening without surprise power loss.

If the issue persists despite diligent troubleshooting, the most responsible course is to seek professional assistance. A healthy battery and a well‑maintained speaker will keep your favorite tracks booming wherever you take them.