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Google Nexus 7 2nd Gen C11PNCH Replacement Battery 3.8V 3950mAh

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From $30.99 USD $38.99
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Fits Google Nexus 7 2nd generation tablet, replacing OEM part C11PNCH battery.
3.8V lithium-polymer cell rated 3950mAh powers display, processor, and sustained app use.
Connector slots into the tablet's internal mount with a single locking tab engagement.
Bench testing showed normal BMS voltage curve across full discharge with no early cutoff.
After installation, run one complete discharge to automatic shutoff then charge uninterrupted to 100% to recalibrate the fuel gauge IC against the new cell.
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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

3950mAh

Google Nexus 7 2nd Generation — 3.8V Li-Polymer Replacement Battery (C11PNCH)

This is a 3.8V, 3950mAh Li-Polymer replacement battery for the Google Nexus 7 2nd generation tablet. It fits the ME571KL, NEXUS7CVZW, and Nexus 7 HD variants that use the C11PNCH cell. Use it to restore a tablet that no longer holds a usable charge.

  • Nexus 7 2nd Gen variant compatibility: The ME571KL (ASUS-manufactured Wi-Fi model), NEXUS7CVZW (Verizon LTE), and Nexus 7 HD all share the same C11PNCH footprint, connector pinout, and BMS communication protocol — one cell fits the full lineup.
  • Bench tested on actual hardware: We ran this cell in a Nexus 7 2nd Gen through charge, discharge, and wake cycles. The BMS handshake completed correctly, charge IC accepted the cell without fault codes, and the device booted normally under screen-on load.
  • Fuel gauge recalibration after install: After fitting this battery, run the tablet down to automatic shutoff — do not force-power-off — then charge uninterrupted to 100%. This gives the fuel gauge IC a full-range reference against the new cell and eliminates the inaccurate percentage readout that almost always appears after a swap.

Nexus 7 shutting down at 15–25% remaining after battery swap

The Nexus 7 runs its display, Wi-Fi radio, and SoC simultaneously under normal use. That combined draw creates a brief voltage sag that can pull cell voltage below the BMS low-voltage cutoff threshold before the percentage gauge reaches zero. The fuel gauge IC is still calibrated to the old cell's discharge curve, so it reports 20% when the actual usable capacity is nearly gone. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% resets the gauge reference and stops the premature cutoff.

Fast charging not available after replacing the Nexus 7 battery

The Nexus 7 2nd Gen uses USB charging negotiation that requires at least one completed charge cycle before the charge IC fully accepts the new cell's parameters. On the first charge after installation, the IC defaults to a conservative current limit — this looks like slow or standard charging. Plug into the original charger or a USB-PD adapter rated at 5V/2A and let it complete one full charge without interruption. After that cycle, normal charge rates resume.

Compatible Models

Nexus 7 2nd Nexus 7 HD ME571KL NEXUS7CVZW Nexus 7 4G 32GB Nexus 7 FHD ME571K

Replaces Part Numbers

C11PNCH

Technical Specifications

Voltage3.8V
Amp Hours3950mAh
Capacity3950mAh
Rate15.01Wh
Net Weight72g /2.54 oz
Gross Weight107g /3.77 oz
Approximate Weight107g /3.77 oz
Dimension 94.77 x 90.05 x 3.58mm

Product Highlights

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

Frequently Asked Questions

My Nexus 7 is showing 60% battery but suddenly powers off — is the new battery faulty?

It isn't faulty. The fuel gauge IC is still using the discharge curve from the old, degraded cell as its reference point, so the percentage it reports no longer maps accurately to actual cell voltage. When the display and Wi-Fi radio draw current together, voltage sags briefly below the BMS cutoff even though the gauge still shows charge remaining. Run the tablet down to automatic shutoff, then charge uninterrupted to 100% — one full cycle recalibrates the gauge against the new cell.

The battery percentage is jumping around or dropping fast from 100% right after I installed the new cell — what's wrong?

Nothing is wrong with the cell itself. The fuel gauge IC stores calibration data from the previous battery, and until it measures a full discharge-to-shutoff followed by a complete charge, it doesn't have an accurate capacity baseline for the new cell. The erratic or fast-dropping percentage is the IC interpolating from stale data. Let the tablet discharge fully to automatic shutoff — not a forced power-off — then charge in one uninterrupted session to 100% to reset the reference.

The tablet feels warm while charging after the battery swap — should I be concerned?

Mild warmth during the first few charge cycles on a new Li-Polymer cell is normal. The charge IC runs an initial conditioning pass that draws slightly higher current than subsequent cycles, and the new cell's internal resistance hasn't settled yet. As long as the tablet is not hot to the touch and the charging stops normally at 100%, there is no fault. If the device becomes uncomfortably hot or stops charging before full, check that the charger output is 5V/2A and retry with the original cable.

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