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Samsung Galaxy S20 EB-BG980ABY Replacement Battery 3.85V 3650mAh

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From $26.99 USD $33.99
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Fits Samsung Galaxy S20 and SM-G980F; replaces OEM battery EB-BG980ABY.
3.85V, 3650mAh lithium-polymer cell delivers full processor and display power restoration.
Connector type is Samsung proprietary push-fit; locking tab seats flush against phone frame.
We bench-tested this cell against the fuel gauge IC; BMS accepted charge protocol on first insertion without fault codes.
On first use after installation, disable fast charging for one complete discharge-charge cycle — this lets the fuel gauge IC recalibrate against the new cell discharge curve before high-current charging.
Delivery time

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

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

3.85V

Amp

3650mAh

Samsung Galaxy S20 / SM-G980F — 3.85V Li-Polymer Replacement Battery (EB-BG980ABY)

This is a 3.85V, 3650mAh lithium-polymer replacement battery for the Samsung Galaxy S20 and SM-G980F. It also fits the Galaxy S11e and SM-G981B, sharing the same voltage rail, connector, and BMS handshake across that hardware family. Install it when the original cell no longer holds charge or causes unexpected shutdowns.

  • Galaxy S20 family compatibility: The SM-G980F and SM-G981B share the same 3.85V nominal rail, physical footprint, and BMS communication protocol — one cell fits both without modification.
  • Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Galaxy S20 unit. The BMS accepted charge at both standard and fast-charge rates, and protection cutoffs fired correctly at low-voltage threshold.
  • Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on the Galaxy S20 after a cell swap

This happens because the fuel gauge IC — a coulomb counter calibrated to the original cell's discharge curve — misjudges the new cell's voltage cliff. Under modem or display load, the new cell's voltage drops faster than the IC expects, triggering a hardware shutdown before the reported percentage reaches zero. It is not a defective battery. One full discharge-to-shutdown followed by an uninterrupted charge to 100% lets the IC relearn the curve. After two or three cycles, shutdown behaviour normalises.

USB-PD fast charge not working on the first cycle after replacement

On a fresh cell, the charge IC on the S20 may fall back to standard 5V charging on the first cycle while it negotiates with the new BMS. This is a handshake delay — not a fault with the cable, adapter, or battery. Disconnect the charger, wait 10 seconds, and reconnect. If fast charge still does not activate, complete one full standard charge cycle first, then retry with a USB-PD adapter delivering at least 9V/1.67A.

Compatible Models

Galaxy S20 Galaxy S11e SM-G980F SM-G981B SM-G981J SM-G981D SC-51A SGH-N410 SM-G981N SM-G980F/DS

Replaces Part Numbers

EB-BG980ABY GH82-22122A

Technical Specifications

Voltage3.85V
Amp Hours3650mAh
Capacity3650mAh
Rate14.05Wh
Net Weight52g /1.83 oz
Gross Weight77g /2.72 oz
Approximate Weight77g /2.72 oz
Dimension 71.70 x 58.28 x 5.20mm

Product Highlights

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

Frequently Asked Questions

My Galaxy S20 shuts off at around 25% after I put in the new battery — is something wrong with the cell?

Nothing is wrong with the cell. The fuel gauge IC is still calibrated to the old battery's discharge curve and misjudges the new cell's voltage drop under load. Let the phone discharge fully until it shuts itself off, then charge uninterrupted to 100% without fast charging enabled. After two full cycles the coulomb counter recalibrates and the early shutdowns stop.

The phone won't turn on at all after the replacement battery sat in storage for a few months before I installed it — what's happening?

If the cell self-discharged below approximately 2.5V during storage, the BMS enters lockout to prevent damage and the phone will not respond to a normal boot press. Connect the phone to a low-current charger — a standard 5W USB adapter, not a fast charger — and leave it for 20–30 minutes before attempting to power on. The BMS needs a trickle current to recover the cell voltage above lockout threshold before it will allow normal charging or boot.

The back of my Galaxy S20 gets noticeably warm near the battery during the first few charges — is the charge IC going to damage the new cell?

A new lithium-polymer cell has higher internal impedance than a broken-in cell, so the charge IC dissipates more energy as heat during the first few cycles. This is normal and the warmth reduces as impedance drops after three to five charge cycles. Keep the phone out of its case during charging for the first few cycles so heat can dissipate. If the phone becomes hot to the touch — not just warm — disconnect and let it cool to room temperature before resuming.

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