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Rectangular lithium polymer laptop battery, dark finish, 13.3 inch compatible

NShi

NShi ON03XL laptop battery 41.5Wh 11.55V 3450mAh for HP Pavilion M3-U 13.3

SKU CH-RMEW-MEQF5

41.5 Wh lithium-polymer battery with 3450 mAh capacity fits HP Pavilion M3-U 13.3" models

  • Battery typeLithium Polymer
  • 5 Wh capacity extends runtime between charges
  • 55 V 3450 mAh lithium polymer cell matches original specs
  • Built-in microchip guards against over-charge, over-discharge and over-heat
  • Compatible with HP Pavilion M3-U 13.3 TPN-W118 HSTNN-UB6W 915486-855
  • Includes battery and tool kit for straightforward installation

NShi ON03XL 41.5Wh replacement battery

This 41.5Wh lithium polymer battery replaces the ON03XL cell in HP Pavilion M3-U 13.3" laptops. It delivers 3450mAh at 11.55V using grade A cells and an internal microchip that guards against over-charge, over-discharge and over-heat. The pack ships with a basic tool kit and no printed manual.

Verify the exact part number before ordering

Confirm that the original battery carries one of the listed identifiers: TPN-W118, HSTNN-UB6W or 915486-855. The Pavilion M3-U 13.3" chassis fits this model, but other revisions may use a different pack. Ensure the laptop is fully powered down and disconnected from mains before opening the case.

Fits inside the existing battery bay

The cell occupies the same footprint as the factory unit, so no case modification or additional cabling is required. Professional installation is recommended because the connector is fragile and the screws are small. Once seated, the battery restores full mobile runtime and frees the user from tethered operation.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $47.99
Pricier than about 80% of the 27,790 comparable items (median $30.99).

Specifications

Power
Battery typeLithium Polymer

Questions about this item

Does the ON03XL package include only the battery or are tools provided as well?

The package includes one ON03XL battery and one tool kit for installation.

My original battery is marked HSTNN-UB6W — will this ON03XL replacement fit my HP Pavilion M3-U 13.3?

Yes, the ON03XL is listed as compatible with HP Pavilion M3-U 13.3 models carrying the HSTNN-UB6W and 915486-855 part numbers.

What runtime can I expect from the 41.5 Wh capacity in daily use?

At 11.55 V and 3450 mAh the 41.5 Wh pack typically delivers several hours of mixed office work on the 13.3-inch Pavilion, varying with screen brightness and workload.

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