Laptop power adapter HP USB-C to 7.4 x 5.0 mm tip, 18.5–20V, 100W, 1.8 m cable

This replacement laptop power adapter for HP provides power via a USB-C input and delivers DC output through a 7.4 x 5.0 mm barrel tip. It supports an output voltage range of 18.5–20V with maximum power delivery up to 100W and comes with a 1.8 m cable to reach typical desk or travel setups. The adapter is designed as a direct power source for HP notebooks that accept the 7.4 x 5.0 mm connector and require 18.5–20V charging.

Advantages

The adapter combines a USB-C input with a dedicated 7.4 x 5.0 mm DC tip to allow use with modern USB-C power sources while maintaining compatibility with laptops that use the barrel connector. With up to 100W power delivery and support for 18.5–20V output, it provides sufficient capacity for charging and operating many HP notebooks. The 1.8 m cable provides flexibility in placement and reduces the need for extension cords.

Suitable for

• HP laptops and notebooks that use a 7.4 x 5.0 mm DC barrel connector and accept 18.5–20V input
• Users needing a spare or replacement power adapter for home, office, or travel
• Situations where a USB-C power source is available but a barrel-tip connection is required

Key specifications

• Output voltage: 18.5–20 V
• Maximum power delivery: up to 100 W
• DC connector: 7.4 x 5.0 mm barrel tip
• Input interface: USB-C
• Cable length: 1.8 m
• Intended use: external laptop power adapter for compatible HP notebooks

How to use

Connect a compatible USB-C power source to the adapter's USB-C input, then insert the 7.4 x 5.0 mm tip into the laptop's DC input jack until it seats securely. Verify the laptop indicates charging and that the required voltage range is supported by the laptop. If the laptop fails to charge, disconnect and inspect the connectors for debris or damage, and confirm the power source supplies sufficient wattage.

Usage recommendations

Use on stable surfaces and avoid sharply bending the cable near the connectors. For best results, pair the adapter with a USB-C power source that can deliver up to 100W and supports negotiated voltage levels within 18.5–20V. If the laptop supports battery maintenance modes, follow the laptop manufacturer's guidance to preserve battery health when using continuous external power.