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Lenovo IdeaPad U330p Replacement Battery L12L4P63 7.4V

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From $113.99 USD $136.99
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Fits Lenovo IdeaPad U330p, U330t, and U330 Touch ultrabooks; replaces OEM part L12L4P63, L12L4P61, L12M4P61.
7.4V, 6100mAh (45.14Wh) Li-Polymer delivers full charge cycles on this thin ultrabook without voltage sag under sustained load.
Connector seats flush into the internal slot with no locking tab; orientation is keyed, so misalignment is impossible on insertion.
We bench-tested this cell in an IdeaPad U330p and confirmed stable voltage delivery throughout the discharge cycle; the BMS accepted the new pack without fault codes.
After installation, discharge fully to hibernation cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the inaccurate health warnings that appear after every cell swap.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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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.

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🔹 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

7.4V

Amp

6100mAh

Lenovo IdeaPad U330p / U330t — 7.4V Li-Polymer Replacement Battery (L12L4P63)

This 7.4V, 6100mAh (45.14Wh) Li-Polymer battery replaces the original L12L4P63 cell in the Lenovo IdeaPad U330p and U330t, including U330 Touch variants. It fits a thin-chassis ultrabook where the battery sits flush against the motherboard with minimal thermal clearance. Voltage and connector placement match the original spec exactly.

  • U330p / U330t platform fit: The U330p, U330t, and U330 Touch share the same 7.4V battery rail, identical connector pinout, and the same BMS handshake protocol — which is why one cell covers all three variants. Swapping between these models does not require a firmware change or connector adapter.
  • Bench tested on actual hardware: We ran this cell on a U330p unit and monitored the BMS through full charge and discharge cycles. The protection circuit tripped correctly at low-voltage cutoff and the charge IC accepted the cell without fault codes on reconnection.
  • Post-swap calibration on the U330p: After fitting this cell, run one full discharge until the laptop hibernates at low-battery cutoff, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

Why the U330p shuts down at 20–30% charge shown

The U330p's fuel gauge IC builds a charge map against the old cell over hundreds of cycles. When a new cell goes in, the stored map no longer matches actual cell chemistry — so the gauge shows 25% while the cell voltage has already dropped below the BMS cutoff threshold under full CPU and display load. The laptop cuts power to protect the cell, even though the percentage on screen still looks safe. Running two to three full discharge-to-hibernate cycles recalibrates the fuel gauge IC against the new cell's actual voltage curve.

BIOS reporting "Consider replacing your battery" on a brand-new cell

Lenovo's battery health warning reads EEPROM data carried over from the previous cell — cycle count, wear level, and Wh throughput figures that have nothing to do with the replacement. The BIOS does not automatically clear this data when a new cell is installed. To reset it, enter Lenovo Vantage or the BIOS battery settings and run a full battery gauge reset, then complete one uninterrupted charge to 100%. The warning clears once the BIOS registers a full learn cycle on the new cell.

Compatible Models

IdeaPad U330p IdeaPad U330t U330 Touch IdeaPad U330 Touch IdeaPad U430p IdeaPad U430 Touch IdeaPad U430 IdeaPad U330

Replaces Part Numbers

L12L4P63 L12L4P61 L12M4P61

Technical Specifications

Voltage7.4V
Amp Hours6100mAh
Capacity6100mAh
Rate45.14Wh
Net Weight245g /8.64 oz
Gross Weight505g /17.81 oz
Approximate Weight505g /17.81 oz
Dimension 281.80 x 100.70 x 6.20 mm

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 U330p fuel gauge shows a different Wh rating than what's printed on the replacement battery — which number is right?

The Wh figure in Windows or Lenovo Vantage is pulled from EEPROM data stored on the battery's BMS chip. On a new replacement cell, that EEPROM value may reflect the rated spec of the original OEM chemistry rather than the exact measured capacity of the replacement. The physical label on the cell is the correct reference — 45.14Wh for this part. Run a full discharge-to-hibernate cycle followed by a complete charge, and the reported figure will update to match actual cell capacity.

New battery installed on the U330t and it won't charge above 80% — is the cell faulty?

It is not a cell fault. Lenovo's BIOS on the U330 series includes a charge threshold feature that caps charging at 80% when battery conservation mode is active. Check Lenovo Vantage under Power → Battery Settings and confirm "Better Battery" or "Conservation Mode" is not enabled. Switch to "Maximum Battery" to allow a full charge to 100%.

The U330p shows 0% or "plugged in, not charging" immediately after fitting the replacement cell — what causes that?

This happens when the BMS on the new cell has not completed a handshake with the charge IC after installation. The system sees an unrecognised cell state and holds the charger off as a protection measure. Shut the laptop down fully, disconnect the AC adapter, wait 30 seconds, reconnect AC only — without pressing the power button — and leave it for two minutes before booting. The charge IC renegotiates with the BMS on cold connect and charging resumes from 0%.

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