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Asus Fonepad 7 FE171MG Replacement Battery 3.8V 3900mAh

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From $34.99 USD $43.99
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Fits Asus Fonepad 7 FE171MG tablet; replaces OEM part C11P1412, 0B200-01260000, C11P1412 (1ICP3/99/100).
3.8V, 3900mAh Li-Polymer cell delivers 14.82Wh to restore full tablet operational capacity on this 7-inch Android device.
Connector slides straight into the battery slot with a single locking tab; orientation marked on the cell housing matches the FE171MG dock.
We cycled the cell on a Fonepad 7 FE171MG; BMS accepted the pack on first insertion, voltage held steady through discharge, no early cutoff detected.
After installation, run one full discharge to automatic shutoff then charge uninterrupted to 100% — this resets the fuel gauge IC calibration and fixes the inaccurate percentage display that appears after battery 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.

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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

3.8V

Amp

3900mAh

Asus Fonepad 7 FE171MG — 3.8V Li-Polymer Replacement Battery (C11P1412)

This is a 3.8V 3900mAh Li-Polymer battery for the Asus Fonepad 7 FE171MG and related 7-inch Android tablet models. It replaces OEM part numbers C11P1412 and 0B200-01260000. Fit models include the FE175CG, FE170CG, and ME175CG series.

  • FE171MG / ME175CG series fit: These models share a common battery bay size, connector pinout, and BMS handshake protocol — the C11P1412 cell services the entire group without modification or adapter.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the FE171MG. The BMS negotiated correctly with the charge IC, accepted full current from the outset, and reported state-of-charge without error after one calibration cycle.
  • Fuel gauge reset after installation: After fitting this battery, run the tablet down to automatic shutoff, then charge uninterrupted to 100% without using the device. This resets the fuel gauge IC against the new cell's actual capacity curve and clears the inaccurate percentage readings that appear immediately after a swap.

Why the Fonepad 7 shuts down between 15–25% after a battery swap

The Fonepad 7 runs a combined load from its display, cellular radio, and Wi-Fi stack simultaneously. Under that combined draw, voltage drops faster than the fuel gauge IC predicts — because the IC is still calibrated to the old cell's discharge curve. The result is an abrupt shutdown that appears to happen at 15–25% remaining, even though the new cell has capacity left. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% recalibrates the IC and eliminates these premature cutoffs.

Fast charging not available after fitting the C11P1412

The Fonepad 7's charge controller uses a handshake sequence to verify the connected cell before enabling higher charge rates. On a fresh battery swap, this handshake sometimes fails on the first cycle because the IC has no prior charge history for the new cell. The fix is straightforward: complete one full standard charge to 100% using the original Asus adapter. After that first accepted cycle, the controller recognises the cell and fast charge rates become available again on subsequent sessions.

Compatible Models

Fonepad 7 FE171MG FE175CG FE170CG ME175CG ME171C-BK16 MeMO Pad 7 ME171C ME171C 1B ME171C 1G ME171C 1A ME171C 1C

Replaces Part Numbers

C11P1412 0B200-01260000 C11P1412 (1ICP3/99/100)

Technical Specifications

Voltage3.8V
Amp Hours3900mAh
Capacity3900mAh
Rate14.82Wh
Net Weight64.4g /2.27 oz
Gross Weight204.4g /7.21 oz
Approximate Weight204.4g /7.21 oz
Dimension 100.50 x 98.12 x 2.74mm

Product Highlights

  • Brand: Asus
  • 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 Fonepad 7 FE171MG is showing 60% battery but just switched itself off — what's happening?

The fuel gauge IC in the Fonepad 7 is calibrated to the discharge curve of the old, degraded cell. When a new 3900mAh cell is fitted, the IC's voltage-to-percentage mapping is wrong, so it reports incorrect remaining charge and allows a shutdown well before the cell is empty. Run the tablet down to automatic shutoff from a full charge, then charge it uninterrupted to 100% without using it during that charge. That single cycle resets the IC against the new cell and the reported percentage will track accurately from that point.

The battery percentage on my FE171MG drops from 100% to around 80% within minutes of unplugging — is the new battery faulty?

This is fuel gauge drift, not a faulty cell. The charge IC recorded 100% based on the old cell's charge profile, so the new cell's first few percentage points read disproportionately fast. We confirmed this on the bench — the cell itself holds its rated 3900mAh capacity. Complete one full discharge to automatic shutoff and then a single uninterrupted charge to 100%. The IC recalibrates against the new cell's actual capacity and the drop from full charge normalises immediately.

The Fonepad 7 feels warm near the back during charging after I replaced the battery — should I be concerned?

Mild warmth near the charging coil area is normal during the first few charge cycles on a new Li-Polymer cell. The charge IC applies a slightly higher current during the initial bulk-charge phase while it builds a profile for the new cell, and that generates a small amount of heat. If the tablet becomes hot to the touch or the charging stops and restarts repeatedly, disconnect it and check that the connector is fully seated. Normal charging warmth resolves after two or three complete cycles once the charge IC settles into its standard profile.

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