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Polaroid MIDB944PXE Replacement Battery 3.7V 3300mAh

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From $46.99 USD $57.99
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Fits Polaroid MIDB944PXE tablet, replaces OEM part AHB3275105.
3.7V, 3300mAh lithium-polymer cell restores full charge capacity to the MIDB944PXE.
Connector seats flush into the internal battery slot with mechanical locking tab.
Bench testing showed clean BMS handshake on first charge with no early cutoff.
After installation, discharge fully to automatic shutoff then charge uninterrupted to 100% — this resets the fuel gauge IC calibration against the new cell and resolves inaccurate percentage display.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

3.7V

Amp

3300mAh

Polaroid MIDB944PXE — 3.7V Li-Polymer Replacement Battery (AHB3275105)

This is a 3.7V, 3300mAh Li-Polymer battery replacing part number AHB3275105 in the Polaroid MIDB944PXE tablet. It matches the original cell's voltage, capacity, and connector footprint. Swap it in when the tablet no longer holds a charge or shuts down unexpectedly under load.

  • MIDB944PXE fitment: The MIDB944PXE uses a single-cell 3.7V Li-Polymer pack with a specific connector pinout and BMS handshake. This replacement matches that configuration so the charge IC communicates correctly with the new cell from the first boot.
  • Bench tested on actual hardware: We ran the cell through charge and discharge cycles on the bench. The BMS accepted charge current without fault flags, and the protection circuit tripped correctly at low-voltage threshold — no runaway, no false cutoff.
  • Fuel gauge reset after installation: After fitting the new cell, run the tablet down to automatic shutoff, then charge uninterrupted to 100% before use. This recalibrates the fuel gauge IC against the new cell and clears the inaccurate percentage readings that appear after a battery swap.

Tablet shutting down at 15–25% remaining after battery replacement

This happens because the fuel gauge IC is still calibrated to the old cell's voltage curve. When the display and Wi-Fi draw current simultaneously, voltage sags faster than the gauge expects, and the OS calls a shutdown before the actual state of charge hits zero. The fix is a full recalibration cycle — discharge to automatic shutoff, then charge to 100% in one uninterrupted session. After that cycle, the gauge maps the new cell's voltage profile accurately and the early shutdowns stop.

Fast charging not available after fitting the new battery

Fast charge protocols on Android tablets require the charge IC to complete at least one accepted charge handshake with the new cell before enabling higher current draw. If the tablet reverts to slow charging after a swap, use the original Polaroid charger and cable for the first full cycle — third-party cables can fail USB-PD negotiation and lock the device to 5V standard charging. Once one full cycle completes with the correct charger, the fast charge mode should re-enable on subsequent sessions. If it does not, check the cable — not the battery.

Compatible Models

MIDB944PXE

Replaces Part Numbers

AHB3275105

Technical Specifications

Voltage3.7V
Amp Hours3300mAh
Capacity3300mAh
Rate12.21Wh
Net Weight60g /2.12 oz
Gross Weight110g /3.88 oz
Approximate Weight110g /3.88 oz
Dimension 112.70 x 74.80 x 3.80mm

Product Highlights

  • Brand: Polaroid
  • Manufacturer: CS
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Polaroid MIDB944PXE battery percentage jumps around — it showed 40% then dropped straight to 5%. Is the new battery faulty?

The battery itself is not faulty — the fuel gauge IC is still calibrated to the old cell's discharge curve and misreads the new one. Run the tablet down to automatic shutoff from whatever charge level it is at, then charge uninterrupted to 100% with the screen off. That single full cycle resets the fuel gauge mapping and the percentage readings stabilise. If the jumping continues after two full cycles, the issue is the gauge IC on the board, not the cell.

The MIDB944PXE feels warm on the back while charging the replacement battery — should I be concerned?

Mild warmth during charging is normal. The charge IC on a new Li-Polymer cell runs a conditioning phase on the first few cycles, which generates slightly more heat than a broken-in cell. Keep the tablet on a hard flat surface during charging so heat can dissipate — avoid charging on a bed or cushion. If the back becomes hot to the touch or the tablet smells unusual, disconnect immediately and check that the battery connector is fully seated. Warmth below 40°C is within normal operating range.

After replacing the battery, the MIDB944PXE percentage drops much faster from 100% than the old battery did — something seems wrong.

Fast early percentage drop is almost always fuel gauge drift, not actual capacity loss. The gauge IC learned the old cell's voltage slope over months of use and is applying that curve to the new cell — the two don't match yet. Do one full discharge to automatic shutoff followed by a full uninterrupted charge to 100%. The gauge recalibrates against the new cell's actual voltage curve during that cycle, and the drop rate normalises. Check the percentage behaviour after that cycle before drawing any conclusions about the cell's capacity.

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