Blueskysea 45W HP Laptop Charger Blue Tip 4.5 x 3.0 mm

What this charger is and who it fits

This 45 W AC adapter replaces the original power supply for HP laptops that use the 4.5 × 3.0 mm Blue Tip connector. It delivers 19.5 V at 2.31 A and matches part numbers such as 740015-001, 741727-001, 845611-001 and PA-1450-56HA across many Pavilion, Spectre x360, Stream, Chromebook and Business Notebook models.

What to verify on your laptop first

Confirm that your existing adapter is rated 45 W with a 19.5 V output and that the barrel plug measures 4.5 mm outer by 3.0 mm inner diameter. Cross-reference the part number printed on the old brick — for example 740015-002, 741727-001 or HSTNN-LA40 — against the compatibility list before ordering.

Thermals noise and power draw in normal use

The unit accepts 100-240 V 50-60 Hz mains input and converts it to a steady 45 W DC output. It runs silently with no moving parts and meets recognised electrical safety standards for the United States and Canada.