Laptop power adapter Energy4U CA31, 91 W, 19 V, 4.74 A

Energy4U CA31 laptop power adapter supplies stable DC power with a fixed output of 19 V and a current capacity of 4.74 A, delivering up to 91 W of power. Designed as a replacement or spare for compatible notebooks, this adapter provides the necessary electrical specifications to charge batteries and run laptops during everyday use and travel. The compact external power brick and integrated cable simplify connectivity and minimise setup time.

Advantages

The adapter offers a reliable 19 V output and a clear 4.74 A rating that match many laptop power requirements, ensuring consistent charging and device operation. With a 91 W power capacity, it supports both battery charging and sustained laptop performance under typical workloads. The Energy4U CA31 is built to be a straightforward direct-replacement option for systems requiring the same voltage and current, reducing compatibility uncertainty when the connector and device specifications align.

Suitable for

• Replacing lost or damaged laptop power adapters with matching voltage/current
• Charging and powering notebooks during travel or remote work
• Using as a secondary adapter at home or in the office
• Powering laptops while performing everyday tasks such as web browsing, office work, and media playback

Key specifications

• Output voltage: 19 V
• Output current: 4.74 A
• Power capacity: 91 W
• Connector type: fixed cable to laptop (verify physical plug compatibility)
• Design: external AC adapter (power brick) with mains input

How to use

Confirm that your laptop requires a 19 V supply and that 4.74 A (or lower) is within acceptable current parameters for your device. Connect the adapter to mains power using the included mains lead, then plug the adapter's output connector into the laptop power inlet until it seats securely. When connected, the adapter will provide power to run the laptop and charge the battery where applicable. Disconnect from mains before stowing the adapter for transport.

Usage recommendations

Use the adapter only with laptops that specify 19 V and accept up to 4.74 A output; check the laptop's power input specifications and connector polarity before use. Avoid exposing the adapter to liquids, extreme temperatures, or prolonged direct sunlight. For best results, allow adequate ventilation around the power brick during operation and replace the adapter if the cable or housing shows signs of damage.