2-power 2P-PA3400U-1BRS - battery

Your HP Pavilion laptop has been slowing down, and you suspect the battery is the culprit. You unplug it and the screen dims, the fan stops, and you're left with a dead machine. This 2-POWER 2P-PA3400U-1BRS replacement battery brings your notebook back to life, letting you work, stream, and game without being tethered to a wall outlet. It's a direct replacement for several HP Pavilion series, including the 15-au, 15-bc, 17-ab, 15-ax, and 17-w, and it matches the original battery's form factor and connector, so installation is straightforward.

Key specifications

• Battery type: Lithium-Ion (Li-ion)
• Voltage: 11.55 V
• Capacity: 3400 mAh / 39.27 Wh
• Number of cells: 3
• Colour: Black
• Rechargeable: Yes
• Installation type: Internal
• Condition: New
• Safety protections: Overcharge, over-discharge, overcurrent, short circuit
• Certifications: CE, RoHS
• Replaces OEM part numbers: HSTNN-UB7A, HSTNN-LB7H, HSTNN-DB7K, 849569-541, 849569-421, 849909-850, TPN-Q172, TPN-Q173

Why choose it

This battery is built with high-quality Li-ion cells that deliver reliable performance and a long service life. It includes multiple safety protections to prevent damage from common electrical issues, and it meets CE and RoHS standards for safety and environmental compliance. Because it's designed specifically for HP Pavilion models, you get a perfect fit and seamless compatibility without any software hacks or adapter cables.

Ideal use cases

• Replacing a worn-out or swollen original battery in an HP Pavilion laptop
• Keeping a spare battery for travel or extended work sessions away from power outlets
• Extending the usable life of an older HP Pavilion notebook
• DIY repair or upgrade for students, professionals, and home users

Good to know

Before ordering, verify that your laptop model is listed in the compatible series and that your original battery part number matches one of the listed replacements. The battery is internal, so you may need a small Phillips screwdriver to open the bottom case. For best results, fully charge and discharge the battery a few times after installation to calibrate the power meter. Always dispose of old batteries properly at a recycling centre.