Polaroid MIDS747PXE Compatible Battery 3.7V 2800mAh

Polaroid MIDS747PXE / MIDS747PXE52 — 3.7V Li-Polymer Replacement Battery (SR3070110P)

This 3.7V, 2800mAh (10.36Wh) lithium-polymer cell is a direct replacement for the Polaroid MIDS747PXE and MIDS747PXE52 tablets. It slots into the same footprint as the original SR3070110P pack — 93.50 × 70.00 × 3.6mm — and connects to the same charge IC and fuel gauge circuit. If your tablet won't hold a charge or shuts down unexpectedly, this is the cell to replace.

• MIDS747PXE and MIDS747PXE52 compatibility: Both tablet variants run the same 3.7V power rail and use the same BMS handshake, connector orientation, and cell footprint, so one part number covers both.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the MIDS747PXE platform. The BMS accepted the cell without fault codes, and the charge IC moved correctly through constant-current and constant-voltage phases to full termination.
• Fuel gauge recalibration after swap: After fitting this cell, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. This resets the fuel gauge IC calibration against the new cell and clears the inaccurate percentage readings that appear immediately after a battery swap.

Polaroid MIDS747PXE shutting down at 15–25% remaining

When the display backlight and Wi-Fi radio draw simultaneously, the combined load causes a sharp voltage sag in a degraded or uncalibrated cell. The BMS reads that sag as a critically low voltage event and triggers an emergency cutoff — even though the reported percentage is still in double digits. A new cell with a fresh calibration cycle eliminates the false floor. After installation, discharge fully to auto-shutoff once, then recharge to 100% without interruption to anchor the fuel gauge to the real cell capacity.

Tablet showing wrong battery percentage after battery replacement

The fuel gauge IC inside the MIDS747PXE was calibrated to the charge curve of the original, often degraded cell. Drop in a fresh 2800mAh pack and the IC is still mapping voltage readings against that old curve — so 80% on screen might mean 60% actual, or the percentage jumps erratically. This is not a fault with the replacement cell. One full discharge-to-shutoff followed by an uninterrupted charge to 100% resets the IC's internal model to the new cell's real voltage curve and resolves the mismatch.