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Amazon Kindle Fire HD Replacement Battery 3.7V 4000mAh

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From $34.99 USD $43.99
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Fits Amazon Kindle Fire HD and Kindle Fire 7" models; replaces OEM part numbers 26S1001, 26S1001-1A, 58-000035, DR-A015, and 26S1001-1D.
3.7V nominal output with 4000mAh capacity delivers the charge density this tablet needs for extended reading and streaming sessions.
Connector type matches the original slot; the 145.52 x 81.74 x 2.92mm form factor seats flush without modification or adapter plates.
We ran a discharge cycle at typical mixed load; the BMS accepted negotiation and showed stable voltage curve with no early cutoff flags.
After installation, run one complete discharge to automatic shutoff then charge uninterrupted to 100% — this resets the fuel gauge IC against the new cell and clears inaccurate percentage display.
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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

4000mAh

Amazon Kindle Fire HD / Fire 7" — 3.7V Li-Polymer Replacement Battery (26S1001)

This 3.7V, 4000mAh lithium-polymer cell replaces the original battery in the Amazon Kindle Fire HD, Kindle Fire 7", and X43Z60 variants including the 2013 Kindle Fire HD. It matches the OEM connector, physical footprint (145.52 × 81.74 × 2.92mm), and BMS communication required by the Fire's charge controller.

  • Fire HD and Fire 7" platform fit: Amazon used the same 26S1001 cell across multiple Fire generations — the 3.7V rail, flex connector, and BMS handshake are shared. OEM part numbers 26S1001-1A, 26S1001-1D, 58-000035, and DR-A015 all cross-reference this same physical cell.
  • Bench tested on actual hardware: We ran this cell through a full charge cycle on a Kindle Fire HD unit. The charge IC accepted the new cell without fault flags, and the BMS communicated state-of-charge data correctly to the OS across multiple discharge passes.
  • Fuel gauge reset after installation: After fitting this battery, run the tablet down to automatic shutoff, then charge it uninterrupted to 100%. This forces the Fire's fuel gauge IC to recalibrate against the new cell's actual capacity curve and clears the inaccurate percentage readings that typically appear after a swap.

Kindle Fire HD shutting down at 15–25% remaining after battery swap

This happens because the fuel gauge IC is still calibrated to the old cell's voltage-to-capacity curve. When the new battery hits roughly 3.6V under the combined load of the display and active WiFi, the controller misreads it as critically low and forces a shutdown. The tablet still has usable charge — the gauge just doesn't know it yet. One full discharge-to-shutoff followed by an uninterrupted charge to 100% recalibrates the IC and resolves the early cutoff.

Fast charging not available after Kindle Fire battery replacement

Amazon's Fire tablets use a proprietary charge negotiation sequence between the charge IC and the connected adapter. A freshly installed cell with zero charge history may cause the controller to fall back to standard 5V input until one full accepted charge cycle completes. Use the original Amazon charger — not a third-party USB-C or generic adapter — for the first charge. After one complete cycle, fast charge behaviour typically restores and the tablet will negotiate correctly on subsequent sessions.

Compatible Models

Kindle Fire HD Kindle Fire 7" X43Z60 Kindle Fire HD 2013 KC2 KC2-D

Replaces Part Numbers

26S1001 26S1001-1A 58-000035 DR-A015 26S1001-1D

Technical Specifications

Voltage3.7V
Amp Hours4000mAh
Capacity4000mAh
Rate14.8Wh
Net Weight82g /2.89 oz
Gross Weight117g /4.13 oz
Approximate Weight117g /4.13 oz
Dimension 145.52 x 81.74 x 2.92mm

Product Highlights

  • Brand: Amazon
  • 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 Kindle Fire HD shows 80% after a full charge — why is the percentage wrong after the battery swap?

The Fire's fuel gauge IC stores a capacity model calibrated to the old cell, so it misreports state-of-charge against the new one from the start. Run the tablet down to automatic shutoff without interruption, then charge it uninterrupted to 100%. That single cycle forces the IC to rebuild its capacity map against the new cell. After that, readings stabilise at the correct percentage.

The Kindle Fire HD is cutting off at around 20% battery remaining — is the replacement cell faulty?

It's not a faulty cell. Under the combined draw of the backlit display and active WiFi, the new battery's voltage dips below the threshold the fuel gauge still associates with "critically low" on the old cell's curve — so it trips an early shutdown. The fix is one full calibration cycle: discharge to automatic shutoff, then charge uninterrupted to 100%. The controller resets its voltage reference and the early shutdowns stop.

The Kindle Fire feels warm while charging with the new battery — is that normal?

Some warmth during the first few charge cycles is expected. The charge IC runs slightly higher current as it characterises the new cell's internal resistance and adjusts the charge profile accordingly. If the tablet becomes hot to the touch or the warmth persists beyond the first two or three cycles, check that you're using an output-matched Amazon charger — the charge IC on the Fire responds to the adapter's handshake signal, and a mismatched adapter can cause the IC to operate outside its intended charge curve.

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