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Amazon Kindle Fire HD 8 Replacement Battery 26S1018 3.8V

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From $34.99 USD $43.99
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Fits Amazon Kindle Fire HD 8 tablet models PR53DC; replaces OEM part numbers 26S1018, 58-000161, MC-28A8B8.
Voltage 3.8V, capacity 4650mAh (17.67Wh) — matches original output for full display and processor load.
Connector sits flush into the battery slot with locking tab on the left edge; orientation keyed.
We ran full-discharge cycles on the PR53DC platform; BMS accepted charge without negotiation delay or fault codes.
After installation, discharge fully to automatic shutoff then charge uninterrupted to 100% — this recalibrates the fuel gauge IC against the new cell and resolves 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

3.8V

Amp

4650mAh

Amazon Kindle Fire HD 8 — 3.8V Li-Polymer Replacement Battery (26S1018)

This 3.8V, 4650mAh Li-Polymer battery replaces the original cell in the Amazon Kindle Fire HD 8 and PR53DC tablet. It matches OEM part numbers 26S1018, 58-000161, and MC-28A8B8. The battery powers the display, processor, wireless, and all onboard functions.

  • Kindle Fire HD 8 and PR53DC fit: Both tablets share the same 3.8V battery rail, connector pinout, and BMS handshake protocol — one cell fits both without modification.
  • Bench tested on actual hardware: We ran this battery through full charge and discharge cycles on a Kindle Fire HD 8. The BMS negotiated charge acceptance correctly, voltage ramp was stable, and the protection circuit tripped at expected low-voltage cutoff.
  • Fuel gauge reset after installation: After fitting this cell, run the tablet down to automatic shutoff, then charge uninterrupted to 100%. This forces the fuel gauge IC to recalibrate against the new cell and clears inaccurate percentage readings that appear straight after a swap.

Kindle Fire HD 8 shutting down at 15–25% remaining after battery swap

This happens because the fuel gauge IC is still calibrated to the voltage curve of the old, degraded cell. When display brightness and WiFi load combine, voltage sags faster than the gauge predicts, and the protection circuit hits cutoff before the reported percentage reaches zero. The tablet reads 20% but the actual cell voltage has already dropped below the safe threshold. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% resets the calibration and stops premature shutdowns.

Fast charging not available after fitting a new Kindle Fire HD 8 battery

The Kindle Fire HD 8 charge IC requires at least one completed charge cycle before it confirms the new cell's internal resistance and accepts higher charge rates. Immediately after installation, the charger may negotiate down to standard 5V/1A as a safety measure. Plug in the original Amazon charger — third-party adapters can stall USB negotiation entirely — and let the first cycle complete without interruption. After that cycle, fast charging resumes at the rated input.

Compatible Models

Kindle Fire HD 8 PR53DC

Replaces Part Numbers

26S1018 58-000161 MC-28A8B8

Technical Specifications

Voltage3.8V
Amp Hours4650mAh
Capacity4650mAh
Rate17.67Wh
Net Weight78.2g /2.76 oz
Gross Weight218.2g /7.70 oz
Approximate Weight218.2g /7.70 oz
Dimension 120.16 x 106.70 x 2.50mm

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 8 shows 80% battery but jumps to 10% and shuts off — is the new battery faulty?

The battery itself is not faulty. The fuel gauge IC inside the tablet calibrated its voltage-to-percentage curve against the old, worn cell, and that map no longer matches the new cell's discharge profile. Run the tablet down to automatic shutoff, then charge it uninterrupted to 100% without using it mid-charge. That single full cycle resets the calibration, and percentage readings stabilise from that point.

The percentage on my Kindle Fire HD 8 is dropping faster than expected from a full charge after I replaced the battery — what's wrong?

This is fuel gauge drift, not a capacity problem with the cell. The gauge IC was calibrated to the old cell's resistance and voltage floor, so it miscounts coulombs on the new cell and accelerates the displayed drain. It is separate from the shutdown-at-20% issue — here the tablet runs to zero correctly, it just shows faster drain from 100%. Run one complete discharge to automatic shutoff and one uninterrupted charge to 100%. Check the percentage curve again after that cycle; it should track evenly across the full range.

My Kindle Fire HD 8 feels warm while charging after the battery replacement — should I be concerned?

Mild warmth during the first few charge cycles after a swap is normal. The charge IC is measuring the new cell's internal resistance and adjusting current delivery accordingly — this process generates slightly more heat than steady-state charging. If the tablet becomes hot to the touch or the back feels uncomfortable to hold, disconnect the charger and check that the replacement cell is seated flat with no pressure on the connector. Normal break-in warmth settles after the first two full charge cycles.

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