LG XNote E510 Replacement Battery 11.1V 4400mAh SQU-702
Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.
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LG XNote E510 Replacement Battery 11.1V 4400mAh SQU-702 - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
LG XNote E510 Replacement Battery 11.1V 4400mAh SQU-702 - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
4400mAh
LG XNote E510 Series — 11.1V Li-ion Replacement Battery (SQU-702)
This 11.1V, 4400mAh (48.84Wh) Li-ion battery replaces the original cell in the LG XNote E510 notebook. It covers the full XNote E510 range, including the E510-G.APTGZ and E510-L.A1TCT variants. Cross-reference OEM part numbers SQU-702 and SQU-703 before ordering to confirm fit.
- XNote E510 platform fit: All E510 variants share the same 11.1V three-cell voltage rail, connector pinout, and BMS handshake protocol — that is why one cell covers the full model range listed above.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on an E510 unit, confirmed BMS communication established correctly, and verified the fuel gauge IC registered capacity without triggering a fault or unknown-cell warning.
- First-cycle reset procedure: After installing, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell data and clears the inaccurate health warning that appears immediately after a cell swap.
BIOS reporting poor battery health after installing a new cell
The XNote E510 BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell's reported values on first boot. When those values don't match its learned baseline, it flags the battery as degraded or unknown — even though the cell is brand new. This is not a fault with the replacement battery. One complete discharge-to-hibernate followed by an uninterrupted full charge resets the learn cycle and writes fresh baseline data to memory.
Laptop shuts down at 20–30% charge shown on screen
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual chemistry. The gauge is still using learned discharge curves from the old, degraded cell, so it misjudges where the voltage cliff sits. Under combined CPU and display load, actual cell voltage drops faster than the gauge predicts, and the laptop hits the low-voltage cutoff before the reported percentage reaches zero. Run two to three full discharge-to-hibernate and full-charge cycles — after that, the gauge recalibrates and the shutdowns stop.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: LG
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
The XNote E510 BIOS shows the new battery as "0% available (plugged in, not charging)" on first boot — what's happening?
The BIOS fuel gauge IC still holds discharge curve data from the old cell and hasn't recognised the new cell's EEPROM signature yet. This causes it to report 0% or refuse to begin a charge cycle on the first boot. Connect the charger, let the laptop sit on the charge screen for five to ten minutes until the BIOS re-initialises the charge controller, then perform one full discharge to hibernate and a full uninterrupted charge to 100%.
Windows is showing the wrong Wh rating for this battery in Device Manager — should I be worried?
No. The Wh value Windows reads comes from the EEPROM embedded in the battery PCB, and replacement cells sometimes report the rated design capacity rather than the installed cell's actual measured value. The physical cell capacity here is 48.84Wh. If the figure shown differs slightly, that is an EEPROM reporting difference, not a capacity shortfall — confirm actual capacity by running a full calibration cycle and checking the charge log.
After the first few charges the XNote E510 fuel gauge jumps erratically — 60% one minute, 45% the next — is the cell defective?
This is a fuel gauge IC calibration issue, not a defective cell. The IC uses stored impedance models from the previous cell to estimate state of charge, and those models don't match the new cell's chemistry yet. Run three full discharge-to-hibernate cycles followed by uninterrupted charges to 100% — the IC builds a new impedance profile against the fresh cell each cycle, and the gauge reading stabilises by the third cycle.
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