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Amazon Kindle Fire HD 7" MC-347993 Replacement Battery 3.7V 3500mAh

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From $27.99 USD $34.99
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Fits Amazon Kindle Fire HD 7" models SQ46CW, B00IKPYKWG, B00IKPW0UA; replaces OEM part MC-347993.
3.7V, 3500mAh lithium-polymer cell delivers the original charge capacity for full tablet runtime.
Connector seats flat against the internal contact pad with no locking tab; orientation marked on housing.
We ran full discharge cycles on the bench; the fuel gauge IC accepted the new cell after first charge cycle.
After installation, discharge the tablet fully to automatic shutoff, then charge uninterrupted to 100% — this recalibrates the battery percentage display 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

3.7V

Amp

3500mAh

Amazon Kindle Fire HD 7" — 3.7V Li-Polymer Replacement Battery (MC-347993)

This is a 3.7V, 3500mAh lithium-polymer cell replacing the original MC-347993 battery in the Amazon Kindle Fire HD 7" tablet (models SQ46CW, B00IKPYKWG, B00IKPW0UA). It fits the same physical footprint at 93 × 78 × 3.50mm and connects to the same charge IC on the mainboard. Capacity matches OEM spec at 12.95Wh.

  • SQ46CW, B00IKPYKWG, B00IKPW0UA compatibility: All three Kindle Fire HD 7" variants use the same battery bay dimensions, the same 3.7V charging rail, and the same connector latch. One cell covers all three without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on a Kindle Fire HD 7" unit. The BMS accepted the cell on first connection, the charge IC recognised the correct chemistry, and the tablet completed a full charge cycle without fault flags.
  • Fuel gauge recalibration after swap: After fitting this battery, run the tablet down to automatic shutoff — do not force-power it off. Then charge uninterrupted to 100%. This gives the fuel gauge IC a full reference cycle against the new cell and clears the inaccurate percentage readings that appear immediately after a swap.

Kindle Fire HD 7" shutting down at 15–25% remaining

This happens because the display backlight and active WiFi together pull enough current to cause a rapid voltage drop near the lower end of the cell's discharge curve. The fuel gauge IC — still calibrated to the old degraded cell — misreads the remaining capacity and triggers an early shutdown. Fitting a new cell alone does not fix this; the gauge still has stale reference data. Run one full discharge-to-shutoff followed by a full uninterrupted charge. After that cycle, the shutdowns at 15–25% stop.

Percentage jumping or dropping fast from 100% after battery replacement

The fuel gauge IC on the Kindle Fire HD 7" stores calibration data tied to the old cell's internal resistance profile. When a new cell goes in, the IC is reading the wrong map — so reported percentage drifts or drops faster than actual charge level. This is not a fault with the replacement cell. Charge the tablet fully, use it to automatic shutoff without interruption, then charge again to 100%. That two-point calibration resets the IC's reference curve to the new cell.

Compatible Models

Kindle Fire HD 7" SQ46CW B00IKPYKWG B00IKPW0UA

Replaces Part Numbers

MC-347993 58-000084 ST08A

Technical Specifications

Voltage3.7V
Amp Hours3500mAh
Capacity3500mAh
Rate12.95Wh
Net Weight59g /2.08 oz
Gross Weight94g /3.32 oz
Approximate Weight94g /3.32 oz
Dimension 93.00 x 78.00 x 3.50mm

Product Highlights

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

Frequently Asked Questions

My Kindle Fire HD 7" keeps shutting off around 20% after I put the new battery in — is this normal?

Yes, this is a fuel gauge calibration issue, not a fault with the cell. The gauge IC still has reference data from the old battery and triggers an early cutoff when voltage sags under screen and WiFi load near the bottom of the discharge curve. Run the tablet down to automatic shutoff — do not force it off — then charge uninterrupted to 100%. One full cycle like this resets the reference and the early shutdowns stop.

Fast charging isn't working after I swapped the battery in my Kindle Fire HD 7" — it's only slow charging now.

The charge IC needs one completed charge cycle before it fully re-negotiates the input protocol with the charger. Plug the tablet into the original Amazon charger and let it run a full charge from low to 100% without interrupting it. After that first accepted cycle, normal charge rate resumes. If it stays slow after a full cycle, check that the charging cable is the original — third-party cables often drop the data pins needed for protocol handshake.

My Kindle Fire HD 7" feels warm while charging after the battery replacement — should I be worried?

Mild warmth during the first few charge cycles on a new lithium-polymer cell is normal. The charge IC is running a slightly higher conditioning current as it maps the new cell's resistance profile. If the back of the tablet stays warm to the touch but not hot, and the tablet charges through to 100% without interrupting, there is nothing wrong. If it becomes hot or the charge stops before 100%, disconnect and check that the connector is fully seated — a partial connection raises contact resistance and generates excess heat at the joint.

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