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HP Essential is a trademark used by Hewlett-Packard (later HP Inc.) to denote their entry-level, inexpensive laptops using the Microsoft Windows operating system, produced since 2009. Products under the "Essential" moniker include the HP Laptop series [ 1 ] and HP Notebook series, as well as products simply branded as "HP".
The 15 ships with a 15.6-inch HP LED display with 1366 × 768 (TN) or 1920 × 1080 (IPS) resolution. The webcam on the Envy 15 is night-vision capable with infra-red sensor. The Envy 15 is designed to house a single 2.5-inch Serial ATA drive, or two 1.8-inch SATA drives, with two 160 GB solid state drives configuration available.
A laptop's battery is charged using an external power supply, which is plugged into a wall outlet. The power supply outputs a DC voltage typically in the range of 7.2—24 volts. The power supply is usually external and connected to the laptop through a DC connector cable. In most cases, it can charge the battery and power the laptop ...