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EB-BW201BBC Samsung Galaxy Folder 2 Replacement Battery 3.8V 2020mAh

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EB-BW201BBC battery restores power to Samsung Galaxy Folder 2 and Golden series flip phones.
3.8V, 2020mAh lithium-ion cell matches OEM output and restores full charge cycles to the device.
Connector is a standard Samsung flip phone contact pad — slot orientation matches original EB-BW201BBC alignment exactly.
We bench-tested this cell in an SM-W2015 test unit; BMS handshake completed on first insertion with no fault codes.
On first use after installation, disable fast charging for one complete discharge-charge cycle so the fuel gauge IC recalibrates against the new cell's discharge curve before high-current charging resumes.
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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

3.8V

Amp

2020mAh

Samsung Galaxy Folder 2 / Golden 2 — 3.8V Li-ion Replacement Battery (EB-BW201BBC)

This is a 3.8V, 2020mAh Li-ion replacement battery for the Samsung Galaxy Folder 2 (SM-W2015), Galaxy Golden 2, and SM-G9198 flip phones. It fits the original EB-BW201BBC slot and restores power to a clamshell handset that runs Android on a hinged form factor. Install it when the original cell can no longer hold charge through a normal day.

  • SM-W2015 / SM-G9198 platform fit: These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. One cell covers both variants without modification.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the SM-W2015. The BMS accepted the charge handshake on the first cycle, balancing correctly at 4.35V full charge with no thermal event.
  • Fuel gauge recalibration on first use: After fitting this cell, disable fast charging and run one complete discharge-to-charge cycle. The fuel gauge IC was calibrated to your old cell's discharge curve. One full cycle resets the coulomb counter against the new cell's actual capacity before high-current charging begins.

Sudden shutdown at 20–30% on the Galaxy Folder 2

A worn cell in the SM-W2015 loses internal voltage stability faster than the fuel gauge can track. When the modem fires or the display brightens sharply, the cell cannot hold voltage above the BMS cutoff threshold — the phone drops out even though the percentage still reads 25%. This is a voltage cliff, not a software bug. A fresh 2020mAh cell with lower internal resistance sustains the voltage rail under those load spikes, so the BMS cutoff is not triggered until the cell is genuinely depleted.

Phone reporting wrong percentage after the cell swap

The Galaxy Folder 2 uses a fuel gauge IC that tracks charge state against the stored discharge curve of the previous cell. Swap the cell and that curve no longer matches the new cell's actual chemistry profile. The percentage readout jumps or stalls because the coulomb counter is still referencing old data. Run one full discharge down to automatic shutdown, then charge uninterrupted to 100% — this forces the IC to map the new curve and stabilises the percentage display.

Compatible Models

SM-W2015 Galaxy Golden 2 Galaxy Golden II SM-G9198 World Flagship III Duos SM-G9098 World Flagship II Duos TD SM-G9092 World Flagship II Duos

Replaces Part Numbers

EB-BW201BBC

Technical Specifications

Voltage3.8V
Amp Hours2020mAh
Capacity2020mAh
Rate7.68Wh
Net Weight34.1g /1.20 oz
Gross Weight59g /2.08 oz
Approximate Weight59g /2.08 oz
Dimension 49.70 x 45.80 x 6.80mm

Product Highlights

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

Frequently Asked Questions

My Galaxy Folder 2 shuts off at around 25% — will fitting this battery fix that?

Yes, that symptom is a voltage cliff — the aged cell cannot sustain voltage when the modem or screen draws a sharp load spike, so the BMS cuts power even though the gauge still shows charge remaining. A fresh cell with lower internal resistance holds the voltage rail above the BMS cutoff threshold under those same load conditions. Fit the replacement and run one full discharge-charge cycle so the fuel gauge IC recalibrates to the new cell's discharge curve before you judge the percentage accuracy.

The percentage is jumping around erratically after I put the new battery in — is it faulty?

It is not faulty. The fuel gauge IC on the SM-W2015 holds a discharge curve mapped to the old cell, and that curve does not match the new 2020mAh cell's profile. The coulomb counter is recalculating against mismatched data. Run one uninterrupted full discharge to auto-shutdown, then charge to 100% without interruption — after that cycle the IC rewrites its reference curve and the readout stabilises.

Fast charging stopped working after I replaced the battery on my SM-W2015 — what's happening?

On the first cycle after a cell swap, the charge IC may not immediately accept the device's proprietary fast-charge protocol handshake with the new BMS. This is normal — the controller falls back to standard charge rates until it completes one full cycle and confirms BMS parameters. Let the phone charge fully at standard rate, discharge normally, then charge again. Fast charging typically resumes on the second or third cycle once the charge IC and BMS have exchanged protocol data correctly.

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Samsung SM-W2015 Replacement Battery, 3.8V, 2020mAh, Li-ion 1

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