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Twinhead N2700 Replacement Battery DR202 10.8V 6600mAh

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From $88.99 USD $109.99
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Fits Twinhead N2700 notebook; replaces OEM part numbers DR202, EMC36, ME202BB, NL2020, and SMP02.
10.8V, 6600mAh (71.28Wh) Li-ion cell restores full portable runtime on the N2700 after original pack degradation.
Connector type and orientation match the N2700 slot; physical dimensions 148 x 89 x 20mm confirm flush seating without modification.
We bench-tested the BMS against Twinhead firmware; cell accepted charge handshake and held voltage under sustained load without early cutoff.
After installation, run one full discharge to hibernation-cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate 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

10.8V

Amp

6600mAh

Twinhead N2700 — 10.8V Li-ion Replacement Battery (DR202)

This is a 10.8V, 6600mAh Li-ion replacement battery for the Twinhead N2700 notebook. It replaces OEM part numbers DR202, EMC36, ME202BB, NL2020, and SMP02. If your original cell has aged out or refuses to hold charge, this cell restores full cordless operation on the N2700 platform.

  • N2700 platform compatibility: The N2700 uses a 10.8V three-cell-series Li-ion architecture with a fixed connector pinout. This cell matches that voltage rail and connector layout exactly, so the BMS handshake completes on first boot without error flags.
  • Bench tested on actual hardware: We ran this cell through charge, full-load discharge, and BMS communication checks. The protection circuit triggered correctly at low-cell cutoff, and charge termination fired at the expected 12.6V ceiling.
  • First-cycle calibration on the N2700: After installing, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the N2700 BIOS throws after every cell swap.

BIOS reporting battery health as poor immediately after installing the new cell

The N2700 BIOS reads health status from EEPROM data written by the original cell's fuel gauge IC. A new cell arrives with factory EEPROM values that don't match the laptop's learned discharge profile. The BIOS sees that mismatch and flags the battery as degraded — even though the cell is new. Running two full discharge-to-hibernate and charge-to-100% cycles rewrites the fuel gauge baseline and clears the warning.

N2700 shutting down abruptly at 20–30% shown on the OS gauge

This is a voltage cliff issue, not a fuel gauge error. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC can recalibrate against the new cell's discharge curve. The BMS trips on under-voltage before the OS gauge reaches zero. After one full calibration cycle — discharge to hibernate, charge uninterrupted to 100% — the fuel gauge IC maps the actual voltage curve of the new cell, and the OS percentage tracks correctly down to the BMS cutoff near 9.0V.

Compatible Models

N2700

Replaces Part Numbers

DR202 EMC36 ME202BB NL2020 SMP02

Technical Specifications

Voltage10.8V
Amp Hours6600mAh
Capacity6600mAh
Rate71.28Wh
Net Weight450g /15.87 oz
Gross Weight514g /18.13 oz
Approximate Weight514g /18.13 oz
Dimension 148.00 x 89.00 x 20.00mm

Product Highlights

  • Brand: Twinhead
  • 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 Twinhead N2700 shows the new battery as "0% available (plugged in, charging)" and won't move off zero — what's happening?

The fuel gauge IC on the new cell hasn't completed its first calibration cycle against the N2700's charge controller, so the OS is reading a stale EEPROM value of zero. This is not a failed cell. Let the laptop charge uninterrupted to 100% without rebooting mid-charge, then run one full discharge to hibernate cutoff. After that cycle completes and you recharge to 100%, the gauge IC rewrites its baseline and the OS percentage displays correctly.

The N2700 BIOS reports the replacement battery's capacity as lower than the rated 71.28Wh — is the cell underspec?

The Wh figure the BIOS displays comes from a static value stored in the cell's EEPROM, not from a live measurement. New replacement cells are sometimes programmed with a conservative factory Wh rating that doesn't match the actual chemistry capacity of 6600mAh at 10.8V. The discrepancy is an EEPROM reporting difference, not an indication that the cell is defective or underbuilt. Run a full discharge-to-hibernate cycle followed by a complete charge and the BIOS-reported figure will update to reflect actual cell behaviour.

After two weeks of normal use the N2700 battery percentage jumps erratically — dropping 15% in minutes then stalling — is this a faulty cell?

This is fuel gauge IC drift, not cell failure. The gauge IC builds its discharge model over the first several charge cycles, and until that model stabilises it misreads the voltage-to-capacity curve at mid-range states of charge. The erratic jumping is most visible between 60% and 30% where the N2700's discharge curve has its steepest slope. Run three full discharge-to-hibernate and charge-to-100% cycles back to back — by the third cycle the gauge IC has enough data to track the curve accurately and the jumping stops.

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