SUNNEAR BN03XL 51Wh Laptop Battery for HP Envy 13/15 271

SUNNEAR BN03XL is a 51Wh, 11.55V Li-ion replacement battery designed to restore runtime for compatible HP Envy and Envy x360 13/15 series laptops.

If your HP Envy or Envy x360 notebook shows short run times, sudden shutdowns, or battery errors, this SUNNEAR BN03XL unit provides a direct-fit swap to regain portable power. Built to match listed HP part numbers and ship with basic installation tools, the battery aims to be a practical aftermarket option for models that use BN03XL / L77034-005 compatible packs.

Which HP models and part numbers does this battery work with?

This battery is compatible with many HP Envy 13-series and Envy X360 13/15-series machines and matches several OEM part numbers. Always verify the battery part number printed on your original battery before ordering to ensure fit and compatibility.

• Compatible families: HP Envy 13, Envy 13-ba, Envy X360 13 and Envy X360 15 (including 15M-EE and 15-ED variants).
• Common OEM cross-references: BN03XL, L77034-005, L76985-271, HSTNN-DB9N, L73965-271.
• Check your laptop’s internal label — model codes like 13-ba0xxx or 15m-ee0023dx should match.

How much power does the SUNNEAR BN03XL provide and what are its specs?

The SUNNEAR replacement delivers 51Wh capacity at 11.55 volts using lithium-ion cells, providing comparable energy to the original OEM packs for supported systems. It’s a direct-replacement design meant to fit the same compartment and connector as the listed HP part numbers.

• Capacity: 51Wh / 4195mAh — suitable for everyday productivity and light multimedia use.
• Voltage: 11.55V — matches original laptop requirements for safe operation.
• Cell type: Li-ion cells assembled in a form factor compatible with BN03XL listings.

What should I know before installing the replacement battery?

Careful pre-checks and basic installation steps reduce risk and improve immediate recognition by the laptop. If the system initially fails to detect the new pack, several simple troubleshooting steps often resolve the issue.

• Open your laptop’s back cover to confirm the original battery model number before purchase.
• Use the included tools for installation; ensure the connector seats fully and screws are secure.
• If not recognized, reinstall the battery, run it down to about 5% and perform 3–4 charge cycles to initialize the pack.

Does this battery come with accessories or installation notes?

Yes — SUNNEAR ships the battery with basic installation tools so you can perform the swap at home. The product description also contains tips for initial conditioning to help the laptop calibrate the replacement pack.

• Included: installation tool set for safe back cover removal and battery swap.
• Tip: avoid discharging to 0%; run to ~5% then recharge to help the battery calibration process.
• Reminder: double-check model compatibility before purchase to avoid returns.

Who is this for: This SUNNEAR BN03XL replacement battery is for HP Envy and Envy x360 owners who need a cost-effective, OEM-compatible battery replacement for models that accept BN03XL/L77034-005-style packs. It suits DIY users comfortable with removing a laptop back cover, technicians outfitting repair jobs, and anyone wanting to restore usable battery life without buying a new laptop. If you’re unsure which pack you need, open the laptop and verify the original battery model number before ordering to ensure a proper match.