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Lenovo L21D2PG1 Tablet Replacement Battery 7.68V 3750mAh

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From $83.99 USD $103.99
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Fits Lenovo 10W-82ST tablet; replaces OEM part numbers L21D2PG1, 5B11F38381, L21C2PG1, L21L2PG1, and L21M2PG1.
7.68V, 3750mAh chemistry delivers 28.8Wh — sustains the display and processor without throttling during active use.
Connector type is proprietary Lenovo; sits flush in the battery slot with a positive contact bar facing the chassis connector.
Bench testing showed the BMS accepted full charge cycles without early cutoff; cell voltage held steady under tablet load.
After installation, run one full discharge to hibernate-cutoff then charge uninterrupted to 100% to reset the BIOS battery learn cycle and clear inaccurate health warnings.
Delivery time

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

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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

7.68V

Amp

3750mAh

Lenovo 10W-82ST Tablet — 7.68V Li-Polymer Replacement Battery (L21D2PG1)

This 7.68V, 3750mAh (28.8Wh) Li-Polymer battery replaces the original L21D2PG1 cell in the Lenovo 10W-82ST tablet. It fits the full 82ST model range, including regional variants 82ST0000JP, 82ST0001CC, and 82ST0001CF, among others. Compatible OEM part numbers also include 5B11F38381, L21C2PG1, L21L2PG1, and L21M2PG1.

  • 82ST variant compatibility: All 82ST models share the same battery bay dimensions (188.90 × 84.35 × 4.40mm), connector pinout, and BMS handshake protocol. The cell voltage rail at 7.68V is consistent across every regional SKU, so one part number covers the full production run.
  • Bench tested on actual hardware: We cycled this cell through charge, full-load discharge, and BMS communication checks. The protection circuit responded correctly to over-current and low-voltage cutoff thresholds, and the fuel gauge IC initialised without error flags.
  • Post-install calibration on the 10W tablet: After fitting this cell, run one full discharge until the tablet hibernates at cutoff voltage, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

Why the 10W-82ST shuts down at 20–30% after a battery swap

The fuel gauge IC on the 82ST builds its discharge curve against the original cell's EEPROM data. When a new cell goes in, that stored curve no longer matches the actual chemistry, so the gauge miscalculates remaining capacity. Under combined CPU and display load, the tablet hits what looks like 20–30% on screen but is actually the cell's real voltage floor. Running two to three full charge-discharge cycles recalibrates the gauge against the new cell and the premature shutdowns stop.

BIOS reporting battery health as poor or unknown immediately after fitting

This is an EEPROM mismatch, not a fault with the replacement cell. The BIOS reads health data written to the old cell's EEPROM and compares it against the new cell's output — the values don't align, so it flags a warning. Boot into the Lenovo Vantage app or the BIOS power settings and run the battery gauge reset function. After one full learn cycle, the BIOS reads the new cell correctly and the health warning clears. If Vantage is not installed, a full discharge to hibernate cutoff followed by an uninterrupted charge to 100% achieves the same reset.

Compatible Models

10W-82ST Tablet 10W-82ST0000JP 10W-82ST0001CC 10W-82ST0001CF 10W-82ST0001EP 10W-82ST0001JP 10W-82ST0001SS 10W-82ST0001US 10W-82ST0002CC 10W-82ST0002CF 10W-82ST0002EP 10W-82ST0002JP 10W-82ST0002SS 10W-82ST0002US 10W-82ST0003JP 10W-82ST0004JP 10W-82ST0005JP 10W-82ST0006JP 10W-82ST0007AD 10W-82ST0007AK 10W-82ST0007AT 10W-82ST0007AX 10W-82ST0007CK 10W-82ST0007FR 10W-82ST0007GE 10W-82ST0007GM 10W-82ST0007HV 10W-82ST0007IU 10W-82ST0007IV 10W-82ST0007IX 10W-82ST0007MB 10W-82ST0007MH 10W-82ST0007MZ 10W-82ST0007NS 10W-82ST0007PB 10W-82ST0007PG 10W-82ST0007SP 10W-82ST0007UK 10W-82ST0008AD 10W-82ST0008AK 10W-82ST0008AT 10W-82ST0008AX 10W-82ST0008CK 10W-82ST0008FR 10W-82ST0008GE 10W-82ST0008GM 10W-82ST0008HV 10W-82ST0008IU 10W-82ST0008IV 10W-82ST0008IX 10W-82ST0008MB 10W-82ST0008MH 10W-82ST0008MZ 10W-82ST0008NS 10W-82ST0008PB 10W-82ST0008PG 10W-82ST0008SP 10W-82ST0008UK 10W-82ST0009AD 10W-82ST0009AK 10W-82ST0009AT 10W-82ST0009AX 10W-82ST0009CK 10W-82ST0009FR 10W-82ST0009GE 10W-82ST0009GM 10W-82ST0009HV 10W-82ST0009IU 10W-82ST0009IV 10W-82ST0009IX 10W-82ST0009MB 10W-82ST0009MH 10W-82ST0009MZ 10W-82ST0009NS 10W-82ST0009PB 10W-82ST0009PG 10W-82ST0009SA 10W-82ST0009SP 10W-82ST0009UK 10W-82ST000AJP 10W-82ST000BJP 10W-82ST000CJP 10W-82ST000DJP 10W-82ST000EAU 10W-82ST000FAU 10W-82ST000GAU 10W-82ST000HAU 10W-82ST000JAU 10W-82ST000KAU 10W-82ST000LAD 10W-82ST000LAT 10W-82ST000LAX 10W-82ST000LCK 10W-82ST000LFR 10W-82ST000LGE 10W-82ST000LGM 10W-82ST000LHV 10W-82ST000LIU 10W-82ST000LIV 10W-82ST000LIX

Replaces Part Numbers

L21D2PG1 5B11F38381 L21C2PG1 L21L2PG1 L21M2PG1

Technical Specifications

Voltage7.68V
Amp Hours3750mAh
Capacity3750mAh
Rate28.8Wh
Net Weight127g /4.48 oz
Gross Weight267g /9.42 oz
Approximate Weight267g /9.42 oz
Dimension 188.90 x 84.35 x 4.40mm

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

The 10W tablet shows the new battery at 0% and won't read it at all — is the cell dead out of the box?

Almost certainly not. The fuel gauge IC is still locked to the old cell's EEPROM profile and hasn't initialised against the new one. Plug in the charger and leave it connected for at least 30 minutes before powering on — the BMS needs a charge stimulus to complete handshake with the system board. If the gauge still reads 0% after that, run the battery reset in Lenovo Vantage, which forces the BIOS to re-learn the cell from scratch.

Windows is showing this battery as 28.8Wh but the system info page says something different — which is right?

The 28.8Wh figure from the cell's actual chemistry is correct. What the system info page sometimes shows is the Wh value stored in the old cell's EEPROM, which gets cached by the BIOS across a swap. The discrepancy is a reporting artefact, not a capacity defect. Run one full discharge-to-hibernate cycle and then a full charge; the BIOS re-reads the live cell data and the reported Wh value updates to match the physical cell.

Charging stops at around 80% and the indicator light goes solid — is this a faulty cell or the tablet?

This is almost always the Lenovo Conservation Mode firmware setting, not a cell fault. The 82ST BIOS ships with a charge threshold that caps charging at 80% to reduce long-term cell stress when the tablet is left plugged in. Open Lenovo Vantage, go to Power, and check the battery charge threshold setting. Switch it from Conservation Mode to Normal Mode and the charge will resume to 100%.

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Lenovo 10W-82ST Tablet Replacement Battery, 7.68V, 3750mAh, Li-Polymer 1

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