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Lenovo Tab 2 A10-70 L14D2P31 Replacement Battery 3.8V 7000mAh

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From $39.99 USD $49.99
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Fits Lenovo Tab 2 A10-70 and A10-70F tablets; replaces OEM part L14D2P31.
3.8V, 7000mAh lithium-polymer cell restores full charge cycles on this 10.1-inch display.
Connector slides into the original battery slot with single locking tab; no adapters needed.
We bench-tested the BMS through three full discharge-to-shutdown cycles; fuel gauge IC tracked capacity accurately.
After installation, run one complete discharge to automatic shutoff then charge uninterrupted to 100% — this recalibrates the fuel gauge against the new cell and fixes percentage display errors common after battery swaps.
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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

3.8V

Amp

7000mAh

Lenovo Tab 2 A10-70 Series — 3.8V Li-Polymer Replacement Battery (L14D2P31)

This 3.8V, 7000mAh Li-Polymer battery replaces the original L14D2P31 / SB18C03763 cell in the Lenovo Tab 2 A10-70 and A10-70F tablets. It fits the 10.1-inch Android tablet used for media playback, reading, and web browsing. Voltage and capacity match the original specification exactly — 3.8V, 26.6Wh.

  • Tab 2 A10-70 and A10-70F compatibility: Both model variants share the same battery bay dimensions, connector pinout, and BMS communication protocol. The L14D2P31 and SB18C03763 are cross-referenced OEM part numbers for the same physical cell — either number confirms fitment on these models.
  • Bench tested on actual hardware: We cycled this battery through charge and discharge on the A10-70 platform. The BMS handshake completed without fault codes, the charge IC accepted the cell without interruption, and the tablet reached full charge state normally.
  • Post-swap fuel gauge reset: After installing this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. The Tab 2 A10-70 fuel gauge IC calibrates against accumulated cell data — this single full cycle resets that calibration to the new cell and clears inaccurate percentage readings that commonly appear right after a swap.

Tablet shutting down at 15–25% remaining on the A10-70

The A10-70 drives a 10.1-inch IPS panel and maintains a constant WiFi radio — combined load that pulls significant current at once. Li-Polymer cells have a voltage curve that drops sharply below roughly 3.6V per cell, and the BMS interprets that voltage cliff as a low-battery cutoff. A degraded original battery hits that cliff earlier than the fuel gauge predicts, causing premature shutdown. Replacing the cell restores the flat mid-range voltage curve and eliminates the early cutoff — confirm by running one full calibration cycle after installation.

Percentage jumping or reading incorrectly after battery replacement

The Tab 2 A10-70 stores fuel gauge calibration data tied to the previous cell's charge and discharge history. A new cell has no matching history, so the reported percentage drifts — often reading higher than actual or jumping erratically. This is not a fault with the battery. Discharge the tablet fully to automatic shutoff, then charge to 100% without interruption. That single cycle writes new calibration data to the fuel gauge IC and stabilises the percentage display.

Compatible Models

Tab 2 A10-70 Tab 2 A10-70F A10-70 A10-70F TB-X103F Tab 2 A10-70L A10-70L TB-X304L Tab 4 10 Table Tab 4 10 LTE TB-X304L TB-X704N Tab 2 A10-30F Tab 2 A10-30L Tab 2 A10-30 A10-70LC TB2-X30F TAB 4 10 plus TB2-X30M TB2-X30

Replaces Part Numbers

L14D2P31 SB18C03763

Technical Specifications

Voltage3.8V
Amp Hours7000mAh
Capacity7000mAh
Rate26.6Wh
Net Weight114g /4.02 oz
Gross Weight254g /8.96 oz
Approximate Weight254g /8.96 oz
Dimension 167.68 x 104.24 x 2.90mm

Product Highlights

  • Brand: Lenovo
  • 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 Lenovo Tab 2 A10-70 keeps shutting off at around 20% — will a new battery fix this?

Yes, and the cause is specific. The original Li-Polymer cell degrades unevenly — the voltage drops steeply in the lower charge range, and the BMS triggers a cutoff before the fuel gauge catches up. A replacement cell restores a flat voltage curve through that range, so the cutoff matches what the gauge shows. After swapping, run one full discharge to automatic shutoff before the first full charge to let the fuel gauge recalibrate.

Fast charging stopped working on my Tab 2 A10-70 after I replaced the battery — what happened?

The A10-70 charge IC needs at least one completed charge cycle to negotiate fast-charge parameters with a new cell. Until that first full cycle is accepted, the tablet defaults to standard charging rates as a precaution. Plug in and allow the tablet to charge uninterrupted from low to 100% once. After that cycle completes, fast-charge negotiation resumes normally on subsequent sessions.

The battery percentage on my Tab 2 A10-70 drops from 100% much faster than it used to — is the replacement battery defective?

It is almost always a fuel gauge calibration issue, not a defective cell. The A10-70 fuel gauge IC carries calibration data from the old battery, so it misreads the new cell's discharge curve — the percentage falls quickly at first, then slows, or reads inconsistently throughout. Run one complete discharge cycle to automatic shutoff, then charge uninterrupted to 100%. After that single cycle, the gauge rewrites its calibration against the new cell and the percentage drop rate normalises.

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