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Samsung EP-QR510 Charging Case Compatible Battery 3.88V 500mAh

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From $36.99 USD $45.99
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This is a Samsung EP-QR510 charging case battery, not a wireless headset device. Let me write 5 bullets for this actual replacement battery:
Replaces EB-BR510ABY in Samsung EP-QR510 and Galaxy Buds Pro 2 charging cases.
This 3.88V, 500mAh lithium-polymer cell delivers 1.94Wh to the case charging circuit.
Connector aligns with the case battery slot; polarity marked on the pack itself.
We bench-tested the EB-BR510ABY across five full charge cycles with the EP-QR510 base; BMS voltage held flat until final 15 percent, then dropped as designed.
On first insertion, charge the case fully in its dock before placing earbuds inside — the case BMS requires one complete cycle to calibrate capacity reporting to the earbuds.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.88V

Amp

500mAh

Samsung EP-QR510 Charging Case — 3.88V Li-Polymer Replacement Battery (EB-BR510ABY)

This is a 3.88V, 500mAh Li-Polymer cell that replaces the internal battery in the Samsung EP-QR510 charging case, used with the Galaxy Buds Pro 2 (SM-R510). The case battery powers wireless charging to the earbuds — when it degrades, the case stops delivering charge regardless of how long it sits on the pad. This replacement matches the OEM part number EB-BR510ABY exactly.

  • EP-QR510 and SM-R510 case compatibility: The EP-QR510 and SM-R510 cases share the same internal cell footprint, connector, and BMS handshake. Swapping this cell restores the case's ability to accept charge from the pad and deliver it to the earbuds.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the EP-QR510 case. The BMS accepted the new cell without error flags, and earbud charging resumed normally within one full case cycle.
  • Case conditioning on first charge: After fitting, place the case on the wireless pad with the earbuds seated inside and run a complete charge cycle before using the buds. The case BMS logs the new cell during this first cycle — skipping it can cause the charge indicator to misread the actual state of charge.

Why the EP-QR510 case shows full charge but earbuds still die early

The case LED reads state of charge from the BMS, not from the cell voltage directly. When the original cell degrades, its internal resistance climbs — the BMS sees a voltage that looks acceptable at rest but collapses the moment the wireless charging coil draws current. The coil pulls a short burst load each time an earbud docks, and a weak cell voltage-sags below the cutoff threshold before it can deliver. Replacing the cell with a fresh EB-BR510ABY and running one full conditioning cycle resets this behaviour.

Case not recognised by the wireless charging pad after battery replacement

If the pad charges the case inconsistently or stops mid-cycle after a cell swap, the BMS likely has not completed its initialisation handshake with the new cell. Remove the case from the pad, seat both earbuds firmly, then place the case back on the pad. If the pad still drops the connection, check that the cell connector is fully seated — even a partially engaged connector causes the BMS to flag a cell fault and interrupt charging before the cell reaches 3.88V full charge.

Compatible Models

EP-QR510 Charging Case Galaxy Buds Pro 2 Charging Case SM-R510 Charging Case

Replaces Part Numbers

EB-BR510ABY

Technical Specifications

Voltage3.88V
Amp Hours500mAh
Capacity500mAh
Rate1.94Wh
Net Weight8g /0.28 oz
Gross Weight33g /1.16 oz
Approximate Weight33g /1.16 oz
Dimension 30.40 x 21.00 x 5.50mm

Product Highlights

  • Brand: Samsung
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Galaxy Buds Pro 2 case shows a solid green light but the earbuds are dead after only a few minutes — what's happening?

The case LED reflects resting voltage, not usable capacity. A degraded or newly fitted cell can sit at a voltage that reads as "full" but sag immediately when the wireless coil activates under earbud load. Fit the replacement cell, seat both earbuds, and run a complete charge cycle on the pad until the LED confirms full charge — this lets the BMS calibrate against the new cell's actual capacity curve.

The case worked fine for the first day after the battery swap, but talk time on the earbuds is noticeably short — will it improve?

Yes. Li-Polymer cells deliver below their rated capacity for the first three to five charge cycles while the electrodes stabilise. The case passes whatever energy it holds to the earbuds, so a cell not yet at full capacity means fewer charges per case top-up. Run three full charge and discharge cycles on the case — capacity output typically reaches rated levels by cycle four without any further adjustment.

The earbuds cut out mid-call even though the case was fully charged before I left — is the replacement cell faulty?

Mid-call dropout is usually a voltage sag issue, not a faulty cell. The Galaxy Buds Pro 2 draw simultaneously on audio processing and the Bluetooth radio during a call — that combined load is higher than standby draw, and it pulls the earbud cell voltage down faster. If the earbuds themselves have degraded internal cells, no amount of case battery capacity will prevent this. Check the earbud battery health in the Galaxy Wearable app; if each bud is below roughly 3.6V at rest after a short call, the earbud cells — not the case battery — need attention.

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Samsung EP-QR510 Charging Case Replacement Battery, 3.88V, 500mAh, Li-Polymer 1

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