Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

Lenovo IdeaPad 5-15ARE05 L21C4PH2 Replacement Battery 15.36V

Up to 19% off
New arrival
From $98.99 USD $121.99
Shipping calculated at checkout.
Fits Lenovo IdeaPad 5-15ARE05, IdeaPad 5-15IIL05, and IdeaPad 5-15ITL05 laptops; replaces OEM part L21C4PH2, L21D4PH2, L21L4PH2, L21M4PH2, SB11B53887, SB11F48157.
15.36V, 4750mAh Li-Polymer cell matches the original pack voltage and capacity for full system power delivery on these Ryzen and Intel IdeaPad 5 models.
Connector seats vertically into the battery slot with a latching tab on the right side; tab alignment prevents backward insertion and ensures firm contact pressure.
We bench-tested the BMS during first full charge cycle; voltage regulation held steady at 15.36V and current taper was normal through 100%, no early cutoff triggered.
After installation, fully discharge the laptop to hibernation sleep, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears health warnings from the old cell's EEPROM data.
Delivery time

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

Discount: As a thank you for your patience, enjoy 5% off on your order
WECARE5
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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

15.36V

Amp

4750mAh

Lenovo IdeaPad 5-15ARE05 / 5-15IIL05 / 5-15ITL05 — 15.36V Li-Polymer Replacement Battery (L21C4PH2)

This is a 15.36V, 4750mAh (72.96Wh) Li-Polymer battery for the Lenovo IdeaPad 5 15-inch notebook series. It fits the IdeaPad 5-15ARE05, 5-15IIL05, and 5-15ITL05 models. It replaces OEM part numbers L21C4PH2, L21D4PH2, L21L4PH2, L21M4PH2, SB11B53887, and SB11F48157.

  • IdeaPad 5 15-inch series compatibility: The ARE05, IIL05, and ITL05 share the same battery bay geometry, connector pinout, and BMS handshake protocol. All three models draw from the same 15.36V four-cell Li-Polymer platform, so one cell fits all three without modification.
  • Bench tested on actual hardware: We cycled this cell on an IdeaPad 5-15ITL05 under mixed CPU and display load. The BMS held charge correctly across full discharge cycles, and BIOS reported capacity within normal bounds after calibration.
  • Post-install calibration on IdeaPad 5: After fitting, run the laptop on battery until it hibernates at low voltage, 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 series.

BIOS reporting poor battery health immediately after replacement

The IdeaPad 5 BIOS stores battery health data in EEPROM tied to the original cell. When a new cell is installed, the BIOS compares live readings against stale EEPROM values and flags poor health — even when the new cell is fine. This is not a fault with the replacement. Running one complete discharge-to-hibernate cycle followed by a full uninterrupted charge gives the BIOS enough data to overwrite the old EEPROM values. After two to three full cycles, the health warning clears and capacity reporting stabilises.

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

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The gauge reports 20–25% remaining, but the cell voltage has already dropped below the BMS cutoff threshold under full CPU and display load — so the system shuts down. It is not a faulty cell. Run two full discharge-to-hibernate cycles without interruption, letting the fuel gauge IC map the new cell's voltage-to-capacity relationship. After calibration, the gauge tracks accurately and the early shutdown stops.

Compatible Models

IdeaPad 5-15ARE05 IdeaPad 5-15IIL05 IdeaPad 5-15ITL05

Replaces Part Numbers

L21C4PH2 L21D4PH2 L21L4PH2 L21M4PH2 SB11B53887 SB11F48157

Technical Specifications

Voltage15.36V
Amp Hours4750mAh
Capacity4750mAh
Rate72.96Wh
Net Weight286g /10.09 oz
Gross Weight546g /19.26 oz
Approximate Weight546g /19.26 oz
Dimension 327.00 x 124.90 x 6.60mm

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 IdeaPad 5 shows the correct percentage but the Wh rating in Lenovo Vantage is wrong after swapping the battery — is the cell actually smaller than listed?

The Wh value shown in Lenovo Vantage reads from EEPROM data embedded in the battery controller, not from live cell measurement. When a replacement cell uses slightly different chemistry binning, the EEPROM-rated Wh can differ from the physical cell's actual capacity. This cell is rated at 72.96Wh — if Vantage shows a different figure immediately after install, run two full discharge-charge cycles to let the BIOS recalibrate against real voltage data. The displayed Wh will correct itself once the fuel gauge IC has mapped the new cell.

The new battery stopped charging at 80% and won't go higher — did I get a faulty unit?

This is almost always a BIOS charge-limit setting, not a cell fault. Lenovo ships many IdeaPad 5 units with Conservation Mode enabled in Lenovo Vantage, which caps charging at 80% to reduce long-term cell wear. Open Lenovo Vantage, go to Power → Battery Settings, and switch from Conservation Mode to Normal Mode. Charging will resume to 100% immediately — no hardware issue involved.

After fitting the replacement, the OS fuel gauge jumps around wildly — showing 60%, then 45%, then 70% within minutes — what is going on?

The fuel gauge IC on the IdeaPad 5 uses a learning algorithm that tracks the old cell's discharge curve stored in memory. A new cell with a fresh discharge profile breaks that reference, so the gauge reads erratically until it builds a new baseline. Run the laptop on battery from full charge down to hibernate cutoff, then charge uninterrupted to 100% — repeat this twice. By the third cycle the gauge IC has enough data to track the new cell accurately and the jumping stops.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

Lenovo IdeaPad 5-15ARE05 Replacement Battery, 15.36V, 4750mAh, Li-Polymer 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections