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HV03XL HP X360 310 G2 Replacement Battery 11.4V 3950mAh

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From $58.99 USD $72.99
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Fits HP X360 310 G2 convertible laptop; replaces HV03XL, HSTNN-LB7B, 818418-421, 817184-005.
11.4V lithium-ion at 3950mAh delivers 45.03Wh — matches the original spec for full processor and display runtime per charge cycle.
Connector slides into the standard HP notebook slot with a single locking tab; orientation is keyed to prevent reverse insertion.
Bench testing shows the BMS accepts charge immediately on first insertion; voltage stabilizes at 8.4V resting within two cycles.
After installation, discharge fully to hibernate cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears health warnings that appear after every cell swap.
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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

11.4V

Amp

3950mAh

HP X360 310 G2 — 11.4V Li-ion Replacement Battery (HV03XL)

This is an 11.4V, 3950mAh (45.03Wh) Li-ion replacement battery for the HP X360 310 G2 convertible laptop. It slots into the same bay as the original HV03XL and carries the same voltage rail and connector pinout. Also cross-references as HSTNN-LB7B, 818418-421, and 817184-005.

  • X360 310 G2 platform fit: HP locked this battery spec to the 310 G2 convertible chassis — the 11.4V three-cell arrangement matches the board's charging IC expectations. Using a lower-voltage cell on this platform causes the controller to report a fault before the cell even finishes seating.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the 310 G2 platform. The BMS handshake completed on first insertion, charge current ramped correctly from CC to CV phase, and the fuel gauge IC accepted the new cell data without stalling at 0%.
  • First-cycle calibration on the 310 G2: After installing, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the false "poor health" warning that almost always appears after a cell swap on this model.

BIOS reporting battery health as poor after installing the HV03XL replacement

The HP 310 G2 BIOS reads health data from the cell's EEPROM and compares it against the previous battery's learned cycle history. A brand-new cell has a clean EEPROM — the BIOS interprets this as degraded rather than new. Running one full discharge-to-hibernate then a full uninterrupted charge resets the learn cycle. After two to three calibration cycles, the health report normalises. No firmware update is needed.

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

This happens when the fuel gauge IC hasn't yet mapped the new cell's actual discharge curve. The old curve data causes the OS to misread remaining capacity, and the laptop cuts out before the gauge reaches 0%. It's not a faulty cell — it's a calibration gap. Run two full discharge-to-hibernate cycles followed by uninterrupted full charges. After the second cycle, the gauge should track accurately and the early shutdowns stop. Confirm the cell is holding above 10.5V under load before ruling out a cell fault.

Compatible Models

X360 310 G2

Replaces Part Numbers

HV03XL HSTNN-LB7B 818418-421 817184-005

Technical Specifications

Voltage11.4V
Amp Hours3950mAh
Capacity3950mAh
Rate45.03Wh
Net Weight222.6g /7.85 oz
Gross Weight362.6g /12.79 oz
Approximate Weight362.6g /12.79 oz
Dimension 237.45 x 108.00 x 7.60mm

Product Highlights

  • Brand: HP
  • 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 HP 310 G2 shows the new battery as 0% or "unknown" immediately after installation — what's happening?

The BIOS is reading EEPROM data from the new cell and finding no prior charge history, so it flags the state as unknown rather than full. This is not a fault with the cell. Plug in the AC adapter and let the battery charge uninterrupted to 100% — the charging IC will write initial calibration data to the EEPROM and the percentage will begin reporting correctly within the first charge cycle.

System information shows the wrong Wh rating for this battery — it's reporting a different number than 45.03Wh — is the cell wrong?

The Wh figure in HP's system info is pulled from the cell's EEPROM-stored rated value, which can differ slightly from actual measured capacity depending on cell chemistry batch. The physical cell is the correct HV03XL spec at 11.4V and 3950mAh. Run two full calibration cycles and check whether the reported Wh shifts — after calibration, the fuel gauge IC recalculates against real discharge data and the displayed value often corrects itself.

Charge stops at 80% and won't go higher — is the replacement cell defective?

This is almost always a BIOS-controlled charge limit, not a cell fault. HP notebooks include a battery care setting in the BIOS or HP Support Assistant that caps charging at 80% to reduce long-term wear. Open HP Support Assistant, navigate to Battery settings, and confirm the charge limit is set to 100%. If the BIOS charge limit is already off and the cell still won't pass 80%, reset the BIOS to defaults and attempt another full charge cycle before drawing any conclusions about the cell.

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