About this replacement
DigiLand DL7006 / KB 7" — 3.7V Li-Polymer Replacement Battery (PR-445585)
This is a 3.7V, 1800mAh Li-Polymer battery for the DigiLand DL7006 and KB 7-inch tablet. It matches OEM part number PR-445585 and fits the original battery bay without modification. Capacity is rated at 6.66Wh, identical to the factory specification.
- DL7006 and KB 7" compatibility: Both tablets run the same 3.7V power rail and use the same PR-445585 connector footprint and cell dimensions — 94.45 × 57.40 × 3.05mm. The BMS on each platform communicates over the same two-wire interface, so no firmware handshake mismatch occurs on swap.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the DL7006 platform. The onboard charge IC accepted the cell without fault flags, and the BMS reported state-of-charge within normal range after one full cycle.
- Fuel gauge reset after installation: After fitting this battery, run the tablet down to automatic shutoff — do not force-close it. Then charge uninterrupted to 100%. This gives the fuel gauge IC a full voltage sweep against the new cell and corrects the inaccurate percentage readings that appear immediately after a swap.
Tablet shutting down at 15–25% remaining after battery swap
The DL7006's fuel gauge IC was calibrated to the old, degraded cell. Its voltage curve no longer maps accurately to the new cell. When the display and WiFi radio draw current simultaneously, voltage sags briefly below the BMS cutoff threshold — even though the cell still has usable charge. Run one full discharge cycle to automatic shutoff, then charge to 100% without interruption. After that cycle, the IC recalibrates its low-voltage threshold to the new cell and the early shutdowns stop.
Fast charging not working after fitting the PR-445585
The DL7006 uses a USB-PD or proprietary charge negotiation sequence that runs on the first accepted charge cycle after a new cell is detected. Until that first cycle completes, the charge IC defaults to a lower current limit as a protection measure. Plug in using the original charger and allow a full uninterrupted charge to 100% — do not use a USB hub or PC port for this cycle. After that, the charge controller re-enables the higher current profile and fast charging resumes at the expected rate.