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Motorola TB40 Xoom 2 10.1 Replacement Battery 3.7V

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From $43.99 USD $54.99
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Fits Motorola Xoom 2 10.1 tablet, replaces TB40, SNN5896A, and L-L-L DC110510 batteries.
3.7V, 6700mAh Li-Polymer cell delivers 24.79Wh — matches original capacity for full daily tablet use.
Connector slides into the battery slot with flat orientation; locking tab seats flush against the housing edge.
We tested the cell on a Xoom 2 MZ615 — BMS accepted the pack on first charge with no fault codes.
After installation, run one full discharge to automatic shutoff then charge uninterrupted to 100% to recalibrate the fuel gauge IC against the new cell.
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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.

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⚠️ 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

6700mAh

Motorola Xoom 2 10.1 Series — 3.7V Li-Polymer Replacement Battery (TB40 / SNN5896A)

This is a 3.7V, 6700mAh Li-Polymer replacement battery for the Motorola Xoom 2 10.1-inch Android tablet. It fits the MZ615, MZ616, and MZ617 variants. Capacity is 24.79Wh — matching the original TB40 specification.

  • MZ615 / MZ616 / MZ617 platform fit: These three MZ-series tablets share the same battery bay dimensions, connector orientation, and charge IC handshake. One cell covers all three — no adapter or modification needed.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on an MZ615 unit. The BMS accepted the charge IC handshake on the first cycle, voltage held stable across display-on and WiFi-active load states, and the protection circuit tripped correctly at the low-voltage cutoff threshold.
  • Post-installation fuel gauge reset: After fitting this battery, run the tablet down to automatic shutoff — do not force-power it off — then charge uninterrupted to 100%. This gives the fuel gauge IC a full reference range against the new cell and clears the inaccurate percentage readings that appear immediately after a swap.

Xoom 2 shutting down at 15–25% battery remaining

This happens when the fuel gauge IC is still calibrated to an old, degraded cell whose voltage curve dropped steeply in that range. The new cell has a flatter discharge curve, but the IC doesn't know that yet. The tablet reads the voltage, maps it against its stored curve, and triggers a low-battery shutdown earlier than it should. One full discharge-to-shutoff followed by an uninterrupted charge to 100% recalibrates the IC against the actual voltage curve of the new cell. After that cycle, shutdowns at 15–25% stop.

Fast charging not available after battery swap

Some Xoom 2 units require one complete accepted charge cycle before the charge IC re-enables higher current delivery to a new cell. This is a protection behaviour — the controller runs an initial slow-rate cycle to profile the new cell before allowing full charge current. Use the original Motorola charger for the first charge, not a third-party adapter. After that first full cycle completes, fast charging resumes at the normal rate on subsequent charges.

Compatible Models

Xoom 2 10.1 MZ615 MZ617 MZ616

Replaces Part Numbers

TB40 SNN5896A L-L-L DC110510

Technical Specifications

Voltage3.7V
Amp Hours6700mAh
Capacity6700mAh
Rate24.79Wh
Net Weight133g /4.69 oz
Gross Weight273g /9.63 oz
Approximate Weight273g /9.63 oz
Dimension 148.06 x 113.45 x 3.80mm

Product Highlights

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

Frequently Asked Questions

My Xoom 2 shows 80% battery right after startup, then jumps to 45% ten minutes later — what's happening?

The fuel gauge IC is still using the voltage curve it mapped to your old, degraded cell. A new cell has a different discharge curve, so the IC misreads the state of charge and produces erratic percentage jumps. Run the tablet down to automatic shutoff without force-powering it off, then charge uninterrupted to 100%. That single cycle gives the IC a clean reference range for the new cell and stabilises the percentage readings.

The Xoom 2 feels warm near the back during the first few charges after the battery swap — is that a problem?

Mild warmth during the first two or three charge cycles is normal with a new Li-Polymer cell. The charge IC runs a formation-style charge on an unfamiliar cell, which generates slightly more heat than a standard top-up. If the tablet stays warm to the touch throughout the full charge rather than cooling once it approaches 100%, check that no background apps are running heavy CPU tasks during charging. Warmth that appears only during charging and stops when the charge completes is not a fault.

Battery percentage drops noticeably faster from 100% to 70% than it does from 70% down — is the cell faulty?

This is fuel gauge drift, not a faulty cell. The IC's stored discharge curve doesn't yet match the actual voltage behaviour of the new cell, so it over-reports draw at the top of the range. The drop from 100% to 70% looks steep on screen even though real capacity loss is proportional across the full range. Run one full discharge to automatic shutoff, then charge uninterrupted to 100%, and the IC recalibrates — the percentage will step down at a consistent rate after that cycle.

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