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HP Slate 7 G2 1311 Replacement Battery 3.7V 2850mAh

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Fits HP Slate 7 G2 1311 and 1315 tablets, replacing OEM battery part number PR-3356130.
3.7V 2850mAh lithium-polymer cell delivers the capacity your tablet needs for standard daily computing and WiFi use.
Connector slides straight into the factory slot with no physical modifications required; locking tab seats flush against the device housing.
We bench-tested this cell in a Slate 7 G2 unit and confirmed the BMS accepted the new pack on first charge without fault codes or voltage sag.
After installation, run one full discharge to automatic shutoff then charge uninterrupted to 100% — this resets the fuel gauge IC against the new cell and fixes inaccurate percentage display that appears after a swap.
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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

2850mAh

HP Slate 7 G2 1311 / 1315 — 3.7V Li-Polymer Replacement Battery (PR-3356130)

This is a 3.7V 2850mAh (10.55Wh) lithium-polymer replacement battery for the HP Slate 7 G2 tablet. It fits the 1311 and 1315 variants of the Slate 7 G2 and uses OEM part number PR-3356130. Install it when the original cell no longer holds a useful charge or swells and lifts the display.

  • Slate 7 G2 1311 and 1315 compatibility: Both variants share the same 3.7V single-cell architecture, the same PR-3356130 connector pinout, and the same charge IC on the motherboard. One cell fits both.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the Slate 7 G2 platform. The charge IC accepted the new cell without error, and the BMS reported no fault flags across the test cycles.
  • Fuel gauge reset after installation: After fitting this battery, run the tablet down to automatic shutoff, then charge it uninterrupted to 100% before use. The Slate 7 G2 fuel gauge IC calibrates against the old cell's wear curve — one full cycle resets that calibration against the new cell and clears inaccurate percentage readings.

Tablet warm during the first few charge cycles after a battery swap

The Slate 7 G2 charge IC runs a conditioning pass on a new lithium-polymer cell during the first two or three charges. During this pass, charge current is slightly higher than steady-state, which produces more heat at the cell. The tablet back will feel warm — not hot — and this is normal. It settles after the cell is conditioned. If the device becomes too hot to hold, disconnect and check that the replacement cell voltage matches the 3.7V nominal spec.

Slate 7 G2 shutting down at 15–25% with no warning

This happens when the display backlight and active WiFi pull simultaneous load and the cell voltage drops below the BMS cutoff threshold before the reported percentage reaches zero. The fuel gauge was calibrated to the old worn cell, so the percentage reading lags the real voltage. A full discharge-to-shutoff followed by an uninterrupted charge to 100% resets the calibration. After that cycle, the percentage should track the actual cell voltage and shutdowns at 15–25% stop.

Compatible Models

Slate 7 G2 1311 Slate 7 G2 1315

Replaces Part Numbers

PR-3356130

Technical Specifications

Voltage3.7V
Amp Hours2850mAh
Capacity2850mAh
Rate10.55Wh
Net Weight53g /1.87 oz
Gross Weight88g /3.10 oz
Approximate Weight88g /3.10 oz
Dimension 132.90 x 55.30 x 3.70 mm

Product Highlights

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

Frequently Asked Questions

My HP Slate 7 G2 is showing the wrong battery percentage after I put in the new battery — it jumped from 30% to 100% randomly. What's going on?

The fuel gauge IC on the Slate 7 G2 motherboard stores a charge curve calibrated to the old worn cell. When a new cell goes in, that stored curve no longer matches, so the percentage reading drifts or jumps. Run the tablet down to automatic shutoff without charging — do not interrupt it — then plug it in and let it charge uninterrupted to 100%. That single full cycle resets the fuel gauge against the new cell and the percentage display stabilises.

The Slate 7 G2 keeps cutting off at around 20% battery even after the new battery is installed. The old battery did this too — why is it still happening?

The combined load of the display backlight and WiFi radio causes a voltage sag that dips below the BMS protection cutoff before the gauge reports zero. If the fuel gauge is still calibrated to the old cell, it reports 20% when the actual cell voltage has already dropped to the cutoff point — around 3.0V. Run one full discharge cycle to automatic shutoff, then charge to 100% without interruption. After recalibration, the percentage reading will align with the real cell voltage and the early shutoffs stop.

After swapping the battery in my Slate 7 G2, the percentage drops from 100% to around 80% very quickly, then slows down. Is the new battery faulty?

It is not faulty — this is fuel gauge drift. The charge IC filled the new cell to 100%, but the gauge's stored capacity model still reflects the old shrunken cell. The early fast drop is the gauge correcting itself under real load. We see this on the bench with freshly installed cells on this platform. Run the tablet down to automatic shutoff and then charge fully without interruption to complete one calibration cycle — the discharge curve will even out after that.

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