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Samsung Galaxy S22 Ultra 5G EB-BS908ABY Replacement Battery 3.85V 4550mAh

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From $26.99 USD $33.99
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Fits Samsung Galaxy S22 Ultra 5G; replaces OEM battery EB-BS908ABY and GH82-27484A.
Rated 3.85V, 4550mAh capacity restores full charge cycles to aged or failed cells.
Connector and contact alignment match OEM slot; no modification to phone housing required.
Bench testing showed BMS accepted charge protocol on first insertion; voltage curve stable under load.
On first use after installation, disable fast charging for one complete discharge-charge cycle to let the fuel gauge IC recalibrate against the new cell's discharge curve.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

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

4550mAh

Samsung Galaxy S22 Ultra 5G — 3.85V Li-Polymer Replacement Battery (EB-BS908ABY)

This is a 3.85V, 4550mAh (17.52Wh) Li-Polymer replacement battery for the Samsung Galaxy S22 Ultra 5G. It fits SM-S908B/DS, SM-S906W, SM-S908E/DS, and related variants. Swap it in when your original EB-BS908ABY has degraded past usable capacity.

  • S22 Ultra 5G platform fit: The SM-S908 series shares a single battery bay, connector pinout, and BMS handshake across regional variants. The same cell services the modem, display, and S Pen digitiser rail without a voltage step-down conflict.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on an SM-S908B/DS. The BMS accepted the cell without a fault flag, and the charge IC stepped through trickle, CC, and CV phases correctly.
  • 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 map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.

Sudden shutdown at 20–30% on a replacement cell

A new cell has a discharge curve the phone's coulomb counter hasn't seen yet. When the modem fires a 5G burst or the display peaks, the phone draws a spike the fuel gauge misreads as a voltage cliff. The system shuts down to protect the cell even though charge remains. One full slow discharge-charge cycle resets the coulomb counter baseline and eliminates most of these false cutoffs.

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

After a cell swap, the charge IC on the S22 Ultra 5G defaults to standard 5W charging on the first session while it reads the new BMS parameters. This is not a fault — it is a handshake delay. Disconnect the cable, wait 10 seconds, and reconnect. If fast charge still doesn't trigger, complete one full standard charge cycle first and it will re-enable at the next session.

Compatible Models

Galaxy S22 Ultra 5G SM-S908B/DS SM-S906W SM-S908E/DS SM-S9080 SM-S908N

Replaces Part Numbers

EB-BS908ABY GH82-27484A

Technical Specifications

Voltage3.85V
Amp Hours4550mAh
Capacity4550mAh
Rate17.52Wh
Net Weight57g /2.01 oz
Gross Weight82g /2.89 oz
Approximate Weight82g /2.89 oz
Dimension 74.74 x 60.00 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 Galaxy S22 Ultra keeps shutting off at around 25% after I put in the new battery — is the cell faulty?

The cell is almost certainly fine. The fuel gauge IC is still calibrated to your old battery's discharge curve, so it triggers a false voltage cliff when the modem or screen pulls a current spike. Run one complete slow discharge — screen on, no fast charge — down to 1%, then charge to 100% without interruption. That single cycle resets the coulomb counter and clears most sudden-shutdown events.

The battery percentage is jumping around erratically — it jumps from 60% to 45% in minutes, then stops draining for a long time.

This is the fuel gauge IC recalibrating against the new cell chemistry. The coulomb counter tracked your previous cell for hundreds of cycles and its reference points no longer match. Perform two full slow charge-discharge cycles with fast charging disabled. After the second cycle, the percentage readout on most SM-S908 units stabilises to within a few percent of actual remaining charge.

The phone won't turn on at all after the replacement battery sat in a drawer for a few weeks before I installed it.

Li-Polymer cells self-discharge in storage, and if voltage dropped below approximately 2.5V per cell, the BMS entered lockout mode to prevent damage. Plug in the original Samsung charger and leave it connected for at least 20 minutes before pressing the power button — the charge IC runs a trickle pre-charge phase to bring the cell above the BMS re-enable threshold. If the screen stays dark past 30 minutes, disconnect, wait 60 seconds, and reconnect to force a fresh trickle charge handshake.

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