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Clevo N350BAT-6 Replacement Battery 11.1V 5200mAh

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From $94.99 USD $116.99
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Fits Clevo N350DV, N350DW, and B519II models; replaces OEM part numbers N350BAT-6, N350BAT-9, 6-87-N350S-4D7, and 6-87-N350S-4D8.
11.1V, 5200mAh lithium-ion cell delivers 57.72Wh — sufficient for four to six hours of mixed workload on this portable workstation depending on CPU and display usage.
Connector slides into the battery bay slot with a single locking tab; physical dimensions match the original pack footprint exactly, no modification needed.
We bench-tested this cell against the N350DV charging circuit; the BMS accepted the new pack on first insertion and completed a full 0–100% charge cycle without voltage cutoff or fault codes.
After installation, run one full discharge to hibernation 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 Clevo platforms.
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.

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⚠️ 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

5200mAh

Clevo N350DV / N350DW Series — 11.1V Li-ion Replacement Battery (N350BAT-6)

This is an 11.1V, 5200mAh (57.72Wh) Li-ion replacement battery for the Clevo N350DV, N350DW, B519II(47781)(N350TW), and B519II(N350TW) laptops. It replaces OEM part numbers N350BAT-6, N350BAT-9, 6-87-N350S-4D7, and 6-87-N350S-4D8. The physical dimensions are 204.90 × 49.10 × 19.90mm — confirm clearance before fitting.

  • N350 platform compatibility: The N350DV, N350DW, and B519II(N350TW) variants share the same battery bay dimensions, connector pinout, and BMS communication protocol. All four OEM part numbers above cross to this cell — the suffix differences reflect minor PCB revisions, not electrical changes.
  • Bench tested on actual hardware: We ran this cell on an N350DV chassis. The BMS handshook correctly on first insertion, charge current ramped normally from CC to CV phase, and the protection circuit tripped at the expected over-discharge threshold without requiring a manual reset.
  • Post-install calibration on the N350 platform: After fitting, run the laptop on battery until it drops to hibernate-cutoff, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning the N350's firmware throws after every cell swap.

BIOS reporting battery health as poor immediately after fitting a new cell

The N350 platform stores charge history and wear data in EEPROM on the battery's PCB. When a new cell is installed, the BIOS reads that EEPROM as blank or mismatched and flags poor health — this is a firmware interpretation issue, not a defective battery. The fix is a full discharge-to-hibernate followed by a complete uninterrupted charge to 100%. After one or two of these learn cycles, the BIOS fuel gauge IC recalibrates against the new cell's actual chemistry and the warning clears.

Laptop shutting down abruptly at 20–30% charge shown on screen

This happens when the cell's voltage drops below the CPU-plus-display load threshold faster than the fuel gauge IC predicts — a voltage cliff that the old cell's calibration data can't map to a new cell. The OS percentage reading is based on a learned discharge curve that no longer matches the replacement cell. Run two full discharge-to-cutoff and uninterrupted full-charge cycles to force the fuel gauge IC to build a new curve against the actual cell. After calibration, shutdowns should stop occurring above 10–11V under load.

Compatible Models

N350DV N350DW B519II(47781)(N350TW) B519II(N350TW)

Replaces Part Numbers

N350BAT-6 N350BAT-9 6-87-N350S-4D7 6-87-N350S-4D8

Technical Specifications

Voltage11.1V
Amp Hours5200mAh
Capacity5200mAh
Rate57.72Wh
Net Weight324.2g /11.44 oz
Gross Weight474.2g /16.73 oz
Approximate Weight474.2g /16.73 oz
Dimension 204.90 x 49.10 x 19.90mm

Product Highlights

  • Brand: Clevo
  • 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

The Clevo N350DV BIOS shows the new battery as "0% available (plugged in, charging)" and never moves — what's wrong?

The BIOS fuel gauge IC lost its reference point when the old cell was removed. It's reading EEPROM data that doesn't match the new cell's chemistry, so the percentage is stuck. Charge the laptop to 100% uninterrupted, then discharge fully to hibernate-cutoff — repeat this cycle twice. After two complete cycles the fuel gauge recalibrates and the percentage tracking normalises.

System information shows the battery's Wh rating as significantly lower than 57.72Wh — is the cell undersized?

No. The Wh figure shown in system info is pulled from the EEPROM on the battery PCB, and on first install that value may reflect a default rated figure rather than the measured capacity of the new cell. The actual usable energy is 57.72Wh as rated. Run one full discharge-to-hibernate followed by a complete charge to 100% — the BIOS recalculates and updates the reported Wh figure against the real cell data.

The N350DV stops charging at exactly 80% and refuses to go higher — is the replacement battery faulty?

This is almost always a BIOS-controlled charge limit, not a battery fault. Clevo's firmware on some N350 builds includes a battery health mode that caps charge at 80% to reduce cell stress — it applies to any cell fitted, new or old. Enter the BIOS setup (F2 at POST), navigate to the battery or power management section, and disable the charge limit or set it to 100%. The cell will then charge to full voltage — approximately 12.6V at termination.

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