Mathorn MPMA – USB Adapters with Built-In Power Meter

Mathorn MPMA (Mathorn Power Meter Adapter) is a series of compact USB adapters that combine fast data transfer with the ability to monitor charging and power parameters, while also serving as practical converters between USB-A and USB-C connectors. Depending on the version, the adapters measure voltage, current, and power, and also indicate the active Power Delivery mode. This gives users an easy insight into the charging and powering process of devices using USB Type-A and Type-C ports.

Fast data transfer

The MPMA series excels wherever fast transfer of large files is essential – from photos and films to projects requiring exceptionally high bandwidth – while power monitoring is also useful. They can also be used to monitor charging and USB port performance without limiting transmission speeds when data transfer is needed. It’s a practical solution for those who want to combine high transfer speeds with real-time monitoring of voltage, current, and power.

Models MPMA-10AC60, MPMA-10CA60, and MPMA-10AA60, each equipped with at least one USB Type-A port, offer transfers up to 10 Gb/s in the USB 3.2 Gen 2 standard and power delivery up to 60 W. The MPMA-40CC140 variant, featuring two USB-C connectors, supports USB 4.0, enabling data transfer up to 40 Gb/s and power delivery up to 140 W under PD 3.1. It also allows video transmission at 8K/60Hz in DP Alt Mode 2.0.

Clear LED display

The MPMA adapters feature a blue LED segment display that clearly presents monitored power parameters. Users can quickly verify whether, for example, a battery is charging correctly and whether Power Delivery mode is active.

Practical applications

The MPMA series is ideal for both everyday home use and technical or service environments. They are practical tools for monitoring USB port load when charging power banks, laptops, or smartphones. Adapters make it easy to assess charging speed when the power source is unknown – such as in a car, aeroplane, or hotel – making them especially useful accessories for frequent travellers.

MPMA adapters in practice

Charging control
With the built-in meter, you can quickly check the charging power of a phone, tablet, or laptop, and whether the charger is operating according to specification.

Cable quality and Power Delivery verification
The adapter can confirm whether a USB cable has an e-marker chip and supports Power Delivery above 60 W – ensuring you’re using your equipment to its full potential. This makes it easy to diagnose cases where a laptop charges too slowly – for example, when the cable limits a charger to 60 W even though the device requires 80 W or more.

USB connector conversion
Models MPMA-10AC60 and MPMA-10CA60 can serve as practical USB A↔C or C↔A adapters. They allow you to connect a USB-A cable to a USB-C device (or vice versa) without issue. This simple solution eliminates connector incompatibility problems and lets you use existing cables without buying new ones.

Easier USB-C cable connection
The adapter allows you to “offset” the USB-C port from a device housing – solving problems where a bulky plug doesn’t fit the port and extra space is needed. Thanks to their ultra-slim casing, MPMA adapters are suitable even for tight spaces where other adapters fail. This is especially helpful with phones and tablets in protective cases, where case edges often limit USB-C port access. With the adapter, you can keep your device protected without sacrificing convenience.

Case studies

• Martin, a professional photographer often working on location, uses the USB meter to check whether and how quickly his laptop can be charged from a car USB socket.

• Alicia, a vlogger, checks before a shoot whether her power bank can power an LED panel while recording outdoors.

• Robert, a photographer, uses the meter to see if his camera batteries are nearly fully charged when charging power drops to a minimum. This saves time and extends battery life by preventing overheating and overcharging.

• Laura, who uses wireless headphones, relies on the Mathorn meter to confirm whether her device is actually charging – rather than just showing a charging indicator.
  
  

Key benefits

• Data transfer from 10 to 40 Gb/s

• Power delivery up to 140 W

• Voltage, current, power, and PD readings depending on adapter model

• Clear blue LED display

• Multiple connector configurations available (CC, AA, AC, CA)

• Ultra-compact design, weight as low as 5 grams
  
  

Technical specifications