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Samsung Galaxy Note 20 EB-BN980ABY Replacement Battery 3.88V 4200mAh

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From $26.99 USD $33.99
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Fits Samsung Galaxy Note 20 and Note 20 5G, replaces EB-BN980ABY OEM battery.
3.88V nominal, 4200mAh capacity — matches original cell voltage and charge stored.
Connector seats vertically into battery slot; tab locks into frame notch on left edge.
Bench test showed BMS voltage ramp stable at 0.8A input; fuel gauge IC required full cycle reset.
On first charge after installation, disable fast charging for one complete discharge-charge cycle to let the coulomb counter recalibrate against the new cell discharge curve.
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

3.88V

Amp

4200mAh

Samsung Galaxy Note 20 — 3.88V Li-Polymer Replacement Battery (EB-BN980ABY)

This 3.88V, 4200mAh Li-Polymer cell replaces the original EB-BN980ABY battery in the Samsung Galaxy Note 20 and Note 20 5G. It fits SM-N981N, SM-N981W, and the broader Note 20 model range. Capacity matches the factory spec at 16.3Wh.

  • Note 20 and Note 20 5G compatibility: Both variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The EB-BN980ABY part number covers the full SM-N980 and SM-N981 series, so one cell works across both the LTE and 5G builds.
  • Bench tested on actual hardware: We cycled this cell through a full discharge and charge sequence on SM-N981 hardware. The BMS accepted the cell without error flags, charge IC handshake completed normally, and the fuel gauge IC began tracking state of charge from the first cycle.
  • Fuel gauge recalibration on first use: After installation, disable fast charging and run one complete discharge-charge cycle at standard rate. The fuel gauge IC on the Note 20 calibrates its coulomb counter against the cell's discharge curve — skipping this step on a fresh cell can leave the IC reading against the old degraded curve.

Sudden shutdown at 20–30% after a Note 20 cell swap

This is a voltage cliff issue, not a capacity fault. The Note 20's modem and display draw current spikes the new cell handles differently than the degraded original. The fuel gauge IC still holds the old discharge curve in memory and misreads the remaining voltage headroom. One full discharge to automatic shutoff followed by an uninterrupted charge to 100% forces the coulomb counter to reset against the new cell's actual voltage profile.

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

Some Note 20 units will not negotiate the 25W fast charge protocol with a new cell on the very first charge. The BMS on the replacement cell starts in a conservative state and may reject the high-current handshake until it confirms cell voltage is stable above 3.5V. Charge once at standard 5W from below 20% to above 90%, then reconnect the fast charger — the BMS typically accepts the 25W profile from that point forward.

Compatible Models

Galaxy Note 20 SM-N981N Galaxy Note 20 5G SM-N981W SM-N9810 SM-N981U SM-N981P SM-N981R4 SM-N981U1 SM-N981V SM-N981A SM-N981T SM-N981B/DS

Replaces Part Numbers

EB-BN980ABY GH82-23496A

Technical Specifications

Voltage3.88V
Amp Hours4200mAh
Capacity4200mAh
Rate16.3Wh
Net Weight53.5g /1.89 oz
Gross Weight103.5g /3.65 oz
Approximate Weight103.5g /3.65 oz
Dimension 75.70 x 55.40 x 5.30mm

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 Note 20 shuts off at around 25% with the new battery — is the cell faulty?

The cell is not faulty. The Note 20's fuel gauge IC calibrated its shutdown threshold against your old degraded cell, and it has not yet mapped the new cell's voltage curve. Run one full discharge to automatic shutoff — do not force power-off — then charge uninterrupted to 100% at standard rate. After that single cycle, the coulomb counter resets and the 25% shutoff should stop.

The phone is showing battery percentage jumping around erratically after I replaced the battery — what's causing it?

The fuel gauge IC is still reading against the discharge curve stored from the original worn cell. It has no accurate reference point for the new cell yet, so state-of-charge estimates swing between sample intervals. Run one complete discharge-charge cycle at standard rate without interruption. The IC re-maps its internal model against the new cell and percentage jumps settle within one to two cycles.

The phone won't turn on at all after the replacement battery sat in a drawer for a few months — what do I do?

Li-Polymer cells self-discharge in storage, and if the cell dropped below approximately 2.5V, the BMS has entered a lockout state to prevent cell damage. Connect the phone to a wall charger — not a PC port — and leave it for 20 to 30 minutes without attempting to power on. The charge IC trickle-charges the cell up to the BMS unlock threshold, typically around 3.0V, at which point normal charging resumes and the phone will boot.

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