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Lenovo IdeaPad Y700 Replacement Battery L14S4P22 14.8V

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From $75.99 USD $93.99
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Fits Lenovo IdeaPad Y700, Y700 Touch, Eraser Y700 models; replaces OEM part L14S4P22, L14L4P23, L14M4P23, 5B10H22084, 5B10H22085.
14.8V 4000mAh Li-Polymer cell delivers 59.2Wh — matches original capacity for full runtime on Y700 hardware.
Connector clips into the factory slot with keyed orientation; locking tab seats flush against the battery well frame.
We ran full discharge cycles and verified the BMS handshake with the Y700 BIOS; cell voltage held steady under sustained CPU and display load.
After installation, discharge fully to hibernate cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings.
Delivery time

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

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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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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

14.8V

Amp

4000mAh

Lenovo IdeaPad Y700 / Eraser Y700 Series — 14.8V Li-Polymer Replacement Battery (L14S4P22)

This 14.8V, 4000mAh (59.2Wh) Li-Polymer battery replaces the original cell in the Lenovo IdeaPad Y700, IdeaPad Y700 Touch, Eraser Y700, and Eraser Y700 Touch. It covers OEM part numbers L14S4P22, L14L4P23, L14M4P23, 5B10H22084, and 5B10H22085. The connector, BMS handshake protocol, and cell voltage match the factory specification.

  • Y700 and Eraser Y700 platform fit: Both the standard and Touch variants of the IdeaPad Y700 and Eraser Y700 use the same 14.8V four-cell pack configuration, shared BMS authentication logic, and identical physical connector — which is why a single part number covers the full lineup.
  • Bench tested on actual hardware: We ran this cell through charge and discharge on a Y700 chassis. The BMS handshook cleanly on first connection, charge acceptance started immediately, and the protection circuit triggered correctly at low-cell cutoff without forcing a hard shutdown.
  • Post-install calibration cycle: After fitting, run the laptop down to hibernate cutoff under normal use, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting poor battery health immediately after installation

Lenovo's BIOS reads EEPROM data written by the original cell and compares it against current charge state. A new cell has no accumulated cycle data, so the firmware flags it as degraded or unknown. This is a firmware interpretation issue, not a cell fault. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% writes fresh calibration data and clears the warning. After two or three cycles the health status normalises.

Laptop shuts down at 20–30% charge shown on screen

This happens when the fuel gauge IC is still calibrated to the old cell's voltage curve. Under full CPU and display load the new cell's actual voltage drops faster than the IC predicts, and the system hits the BMS low-voltage cutoff before the OS gauge reaches zero. The gauge reports 20–30% while the real cell voltage is already at the protection floor — around 11.0V for a four-cell 14.8V pack. Run two full calibration cycles and the fuel gauge IC maps correctly to the new cell's discharge curve.

Compatible Models

IdeaPad Y700 IdeaPad Y700 Touch Eraser Y700 Eraser Y700 Touch IdeaPad Y700-15acz Y700 Touch-15ISK Y700-15ISK-ISE Y700-15-ISE Y700-15ACZ Y700-15ISK Y700-17ISK Y700-15ISK-IFI Y700-15-IFI Y700 Y700-ISE IdeaPad Y700-15ISK Y700-15AC IdeaPad Y700 Touch-15ISK IdeaPad Y700-15ISK-ISE IdeaPad Y700-15-ISE IdeaPad Y700-17ISK IdeaPad Y700-15ISK-IFI IdeaPad Y700-15-IFI IdeaPad Y700-15AC

Replaces Part Numbers

L14S4P22 L14L4P23 L14M4P23 5B10H22084 5B10H22085

Technical Specifications

Voltage14.8V
Amp Hours4000mAh
Capacity4000mAh
Rate59.2Wh
Net Weight294g /10.37 oz
Gross Weight434g /15.31 oz
Approximate Weight434g /15.31 oz
Dimension 201.30 x 129.80 x 14.42mm

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 OS battery gauge is jumping around wildly — showing 60%, then 30%, then 80% within an hour. What's going on?

The fuel gauge IC in the Y700 calibrates its capacity model against the old cell's charge curve stored in EEPROM. When a new cell goes in, that stored curve no longer matches real cell behaviour, so the gauge output is erratic. We saw the same behaviour on the bench for the first two cycles before the IC re-mapped. Run two complete discharge-to-hibernate and full-charge cycles — the gauge stabilises once the IC has enough data points on the new cell.

Windows and Lenovo Vantage both show this battery's Wh rating as wrong — it says something different from the 59.2Wh on the label. Is the cell faulty?

The Wh figure Windows reads comes from static EEPROM data written by the OEM cell, not from measuring the new cell directly. The replacement cell is 59.2Wh as rated; the mismatch is a firmware reporting artefact. No fix is needed for performance — the cell charges and discharges correctly regardless of what the system info panel displays. If the discrepancy matters for your records, a full discharge-to-hibernate cycle followed by a 100% charge prompts the BIOS to update the reported value.

The new battery stopped charging at 80% and just sits there. The laptop doesn't say it's fully charged — it's still showing the charging icon but capacity won't move past 80%.

Lenovo BIOS on the Y700 series includes a battery conservation mode that caps charge at 60% or 80% to reduce long-term cell stress. It is not a battery fault. Open Lenovo Vantage, go to Power → Battery, and check whether Conservation Mode or a charge threshold is enabled. Disable conservation mode and the cell will charge to 100%.

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