DigiLand DL1028W Replacement Battery 3.7V 5500mAh

DigiLand DL1028W — 3.7V Li-Polymer Replacement Battery (PR-3572102-2S)

This 3.7V, 5500mAh Li-Polymer battery replaces the original cell in the DigiLand DL1028W 10-inch Android tablet. It carries OEM part number PR-3572102-2S and matches the original's dimensions at 136.20 x 112.30 x 3.20mm. If your DL1028W no longer holds a charge or shuts down unexpectedly, this cell restores full battery function.

• DL1028W fitment: The PR-3572102-2S shares the same flat Li-Polymer cell format and connector pinout as the factory battery. The tablet's charge IC communicates directly with this cell over the same voltage rails, so the BMS handshake completes without modification.
• Bench tested on actual hardware: We cycled this battery through charge and discharge on the DL1028W mainboard. The charge IC accepted the cell on the first cycle, BMS protection tripped correctly at low-voltage cutoff, and capacity read within expected range at the fuel gauge register.
• Fuel gauge recalibration after swap: After installation, run the tablet down to automatic shutoff, then charge uninterrupted to 100% without using the device. This gives the fuel gauge IC one full reference cycle against the new cell and clears percentage drift caused by calibration data stored for the worn original.

Why the DL1028W shuts down at 15–25% remaining

The DL1028W runs a 10-inch display alongside WiFi simultaneously during normal use. That combined draw pulls the cell voltage down sharply compared to light loads. When the voltage sags below the charge IC's cutoff threshold, the tablet interprets it as empty and shuts off — even though the fuel gauge still shows charge remaining. A freshly installed cell with an uncalibrated fuel gauge makes this worse, because the IC has no accurate low-voltage reference point for the new cell. Running one full discharge-to-shutoff cycle corrects the reference and eliminates most of these mid-use shutdowns.

Battery percentage stuck or jumping after replacement

The DL1028W fuel gauge IC learns cell characteristics from previous charge cycles stored in firmware. When a new cell goes in, those stored values no longer match actual cell voltage, so the percentage display lags, jumps, or freezes. This is a calibration problem — not a fault with the battery. Discharge the tablet completely until it powers off on its own, then charge to 100% without interruption. After that single cycle, the gauge recalibrates against the new cell's actual voltage curve and the percentage display stabilises.