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Samsung M40 Plus Replacement Battery 11.1V 6600mAh SSB-X15LS3

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From $80.99 USD $99.99
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Fits Samsung M40 Plus, NX30, SX15-C16B, and X50 WVM 2000 laptops; replaces SSB-X15LS3, SSB-X15LS6, SSB-X15LS9, and related OEM part numbers.
This 11.1V, 6600mAh lithium-ion cell delivers 73.26Wh to sustain full CPU and display load without mid-session shutdowns.
Physical connector is a three-pin contact block; slides into the battery bay slot with a left-side locking tab that seats flush against the chassis wall.
Bench testing on an M40 Plus showed the BMS accepted the new cell and charged to full capacity within two cycles; voltage held steady under sustained load.
After installation, discharge the laptop fully to hibernation sleep, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears false "poor health" warnings that appear after every cell swap.
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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

11.1V

Amp

6600mAh

Samsung M40 Plus / X50 Series — 11.1V Li-ion Replacement Battery (SSB-X15LS3)

This 11.1V, 6600mAh Li-ion battery replaces the original cell in the Samsung M40 Plus, NX30, SX15-C16B, X50 WVM 2000, and related notebook models. It slots into the same bay and connects via the same multi-pin connector as the factory pack. Capacity figure is 6600mAh / 73.26Wh — use that number when comparing against your current pack rating.

  • M40 Plus and X50 platform fit: These models share the same 11.1V three-cell Li-ion architecture and identical BMS connector pinout. The SSB-X15LS3 part number covers the full OEM cross-reference list, including SSB-X15LS6, SSB-X15LS9, and their regional variants.
  • Bench tested on actual hardware: We cycled this pack through charge, full discharge to BMS cutoff, and a second full charge on an M40 Plus unit. The BMS handshake completed cleanly, charge acceptance was normal, and the pack held stable voltage through the discharge curve without unexpected cutoffs.
  • Post-install discharge cycle on the M40 Plus: After fitting this battery, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

BIOS reporting poor battery health immediately after fitting a new cell

The Samsung M40 Plus BIOS reads health data stored in the battery's EEPROM, not from live cell measurements. When a new pack is installed, that EEPROM hasn't yet been written with cycle data matching the new chemistry, so the BIOS flags it as degraded. Running one complete charge-discharge-recharge cycle forces the fuel gauge IC to recalibrate and write fresh data to the EEPROM. After two or three full cycles, the health reading in both BIOS and Windows normalises. No firmware update or driver change is needed — the calibration cycle does the work.

Laptop shuts down abruptly while the OS still shows 20–30% charge

This is a voltage cliff issue, not a capacity fault. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC can track, and the BMS triggers a hard cutoff before the displayed percentage reaches zero. It happens most often on the M40 Plus when running a CPU-intensive task on battery with full brightness. The fix is the same learn cycle — discharge fully to hibernate, recharge to 100% without interruption. Once the fuel gauge IC has mapped the real discharge curve of the new cell, the shutdown threshold and the displayed percentage will align.

Compatible Models

M40 Plus NX30 SX15-C16B X50 WVM 2000 X50 HWM 740 X25 XVM 1600 X20 XVM 740 X20 XVM 1700 X20 XVM 1600 III X20 M40 Plus WVM 2000 M40 Plus HWM 745 X50 WVM 1600 M40 X50 XWM 750 X50 X30 X25 X20 XVM 730 X20 XVM 1600 V X20 XVM 1600 II X20 LVC 730 M40 Plus WVM 1600 X20 HVM 740 X50 XWM 740 X50 HWM 760 X25 XVM 2000 X25 HVM 750 X20 XVM 1730 X20 XVM 1600 IV X20 XVM 1600 X15 Plus

Replaces Part Numbers

SSB-X15LS3 SSB-X15LS6 SSB-X15LS6/C SSB-X15LS6/E SSB-X15LS6S SSB-X15LS9 SSB-X15LS9S SSB-X15LS9/C SSB-X15LS9/E

Technical Specifications

Voltage11.1V
Amp Hours6600mAh
Capacity6600mAh
Rate73.26Wh
Net Weight174.1g /6.14 oz
Gross Weight324.1g /11.43 oz
Approximate Weight324.1g /11.43 oz
Dimension 205.97 x 26.63 x 21.81mm

Product Highlights

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

Frequently Asked Questions

My Samsung M40 Plus shows the new battery as "0% available (plugged in, not charging)" right after fitting it — what's wrong?

The fuel gauge IC on the M40 Plus reads EEPROM data from the previous pack and can't map it to the new cell straight away. Plug in the AC adapter, leave it connected until the charge LED goes solid, then do a full discharge to hibernate before charging again uninterrupted. After two full cycles the OS fuel gauge recalibrates to the new cell and the charge reading settles correctly.

Windows Battery Report is showing this cell's Wh rating as lower than the 73.26Wh on the listing — is the battery undersized?

The Wh figure Windows reads comes from the EEPROM on the new pack, which stores rated chemistry values that may differ slightly from the 73.26Wh actual capacity figure. This is an EEPROM reporting difference, not a capacity shortfall in the physical cells. Run two full charge-discharge cycles and check again — the fuel gauge IC updates its Wh estimate as it maps actual voltage curves against the new cell. The 73.26Wh figure in the product data reflects the real measured capacity.

Charging stops at around 80% and the indicator light goes off as if the pack is full — is the BMS faulty?

On the M40 Plus, the BIOS includes a charge-limit mode that caps charging at roughly 80% to reduce cell stress during AC-heavy use. Check the Samsung Battery Manager or Power Management settings in Windows — this feature is firmware-controlled and enabled by default on some regional builds. Disabling it in the battery manager software restores full charge acceptance to 100%. This is a BIOS setting, not a fault with the replacement cell.

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