Power supply MITSU 5ZM028 19.5V 2.31A with 4.5x3.0 mm tip

The MITSU 5ZM028 is a replacement laptop power supply that delivers a regulated 19.5V DC output at 2.31A using a 4.5×3.0 mm barrel connector. Designed for portable devices and notebooks that require this voltage and current, the adapter provides stable power for charging batteries and running equipment directly from mains power. The compact form factor and standard barrel tip make it suitable as a spare or replacement for original manufacturers' adapters, provided the connector size, voltage and polarity match the target device.

Advantages

This power supply provides steady 19.5V output with built-in regulation to protect connected devices from voltage fluctuations. The 2.31A maximum current supports typical notebook charging loads while keeping the adapter lightweight and compact. The 4.5×3.0 mm barrel connector is a common size for many laptop models, enabling straightforward replacement for compatible units. The adapter is intended for safe, everyday use when matched to device requirements.

Suitable for

• Charging laptops and notebooks that accept 19.5V and up to 2.31A
• Replacing a lost or damaged original power adapter with a compatible barrel tip
• Using as a spare adapter for travel or office backup

Key specifications

• Output voltage: 19.5V DC
• Maximum output current: 2.31A
• Connector type and size: barrel connector, 4.5×3.0 mm
• Function: regulated DC power supply for portable devices
• Intended use: charging and powering compatible notebooks and portable electronics

How to use

Confirm that the target device accepts 19.5V DC and that its required current does not exceed 2.31A. Verify the 4.5×3.0 mm barrel connector fits securely and that polarity matches the device's requirements. Connect the adapter to mains power, then insert the barrel tip into the device power socket. Monitor the first charge to ensure proper operation and to confirm there is no overheating or unusual behavior. Disconnect from mains when not in use or when the device is fully charged following the device manufacturer's guidance.

Usage recommendations

Use only with devices that match the specified voltage and connector size; mismatched voltage, inadequate polarity or incorrect connector fit can damage the device. Avoid using the adapter in excessively humid or dusty environments and allow adequate ventilation to prevent overheating during extended use.