About this replacement
Amazon Kindle Fire HD 10.1 — 3.8V Li-Polymer Replacement Battery (26S1015-A)
This 3.8V, 6200mAh (23.56Wh) lithium-polymer cell replaces the original battery in the Amazon Kindle Fire HD 10.1, including the 7th generation (SL056ZE). It fits the same footprint at 130.55 × 108.67 × 2.70mm, matching the OEM dimensions exactly. If your tablet no longer holds a charge or shuts off unexpectedly, this is the direct cell swap.
- Kindle Fire HD 10.1 7th Gen (SL056ZE) fit: The 7th generation shares the same battery bay dimensions, connector pinout, and BMS communication protocol as earlier HD 10.1 units. One cell covers both variants without modification.
- Bench tested on actual hardware: We ran this cell on a Kindle Fire HD 10.1 7th Gen unit and confirmed full BMS handshake on first connection. The charge IC accepted the cell immediately and stepped through its standard CC/CV charge profile without fault flags.
- 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's actual capacity curve and clears the inaccurate percentage readings that appear after any cell swap.
Kindle Fire HD 10.1 shutting down at 15–25% remaining after a battery swap
The Fire HD 10.1 pulls combined load from the display backlight and Wi-Fi radio simultaneously during video or browsing. When the fuel gauge IC is still calibrated to the old, degraded cell, it misreads the new cell's actual state of charge. At around 15–25%, the reported percentage no longer matches real voltage, and the system hits its hardware low-voltage cutoff before the gauge reaches zero. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% resets the calibration. After that cycle, the gauge tracks correctly against the new cell's voltage curve.
Fast charging not available after battery replacement
The Kindle Fire HD 10.1 uses Amazon's proprietary fast-charge negotiation over the USB port. On first connection after a swap, the charge IC treats the new cell as uncharacterised and defaults to a conservative standard charge rate. This is a single-cycle behaviour — it is not a fault with the cell or charger. After one complete charge cycle from low to 100%, the IC accepts the cell's profile and fast-charge negotiation resumes normally with a compatible Amazon adapter.