OUWEE SE03XL Laptop Battery for HP Pavilion 14/15

OUWEE SE03XL is a direct replacement Li-ion laptop battery designed to restore runtime for compatible HP Pavilion and Envy 14–15 series notebooks.

If your HP Pavilion or compatible notebook is running shorter on battery life or refuses to power on without the charger, the OUWEE SE03XL battery offers a like-for-like replacement with 11.55V and 41.5Wh (3615mAh) capacity. It matches multiple OEM part numbers and model variants so you can swap it in without modifying your laptop. The pack is intended as a component-level replacement for users comfortable handling internal battery swaps or taking the device to a technician.

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

The OUWEE SE03XL is compatible with a wide set of HP Pavilion, Envy and Pavilion x360 models and maps to several OEM part numbers used by replacement suppliers. Check your laptop’s existing battery label and part number to ensure a match before ordering, because connector shapes and cable lengths can vary by factory batch.

• Compatible part numbers: SE03XL, SE03041XL, HSTNN-LB7G, HSTNN-UB6Z, TPN-Q171, 849568-421, 849568-541, 849908-850, SEO3XL.
• Common laptop fits: HP Pavilion 14 series (14-AL000, 14-AL125TX, 14-AL136TX and listed variants), some Pavilion 15, Envy 15 and Pavilion x360 models.
• Always compare your current battery label and connector image before purchase.

How do I install the OUWEE SE03XL safely and get the best battery life?

Installation requires opening the laptop back cover and unplugging the existing battery connector; if you’re not comfortable, seek a service technician. After first installation, perform a few shallow discharge/charge cycles to allow the battery management system to calibrate and recognize the new pack.

• Power down and remove AC adapter before opening the case.
• Confirm connector alignment and full seating; reseat if not recognized initially.
• Discharge to about 5% (not 0%), then fully charge; repeat 3–4 cycles to condition the battery.
• If recognition fails, reinstall and verify interface and cable orientation.

What are the technical specifications, and what should I expect from performance?

The battery is a lithium-ion pack rated at 11.55 volts and 41.5 watt-hours (3615 mAh), matching the nominal output of many OEM HP replacement cells. Expect comparable runtime to the original battery when used under similar workloads; battery life will vary with screen brightness, processor load, and wireless activity.

• Chemistry: Li-ion; Voltage: 11.55V; Capacity: 41.5Wh / 3615mAh.
• Designed as a direct replacement, not an upgrade—runtime depends on your laptop’s power draw.
• Factory variations may produce differences in cable length or outer dimensions; verify fit.

How do I confirm this battery matches my laptop before ordering?

Compare the part numbers printed on your current battery and examine the connector style and screw locations — order only when the numbers or physical connector match. The product listing includes sample connector photos; if your battery differs, contact the seller for clarification before purchase.

• Match one of the listed part numbers or confirm your laptop model in the compatibility list.
• Use the product images to check plug shape, cable length, and mounting points.
• When in doubt, provide your laptop model and existing battery part number to support.

Who this is for: The OUWEE SE03XL battery is aimed at owners of older HP Pavilion, Envy and Pavilion x360 notebooks who need a reliable replacement pack that mirrors the original specifications. It suits DIY-savvy users and repair shops that replace internal batteries, as well as anyone seeking a cost-effective way to return their laptop to portable use. If you need plug-and-play external power or are unsure about opening your laptop, consider professional installation.