Summary of FOUR PORTS INTELLIGENT AND HIGH POWERED CHARGER USB CHARGER
The Four4 multi-port USB charger is a high-power, intelligent charger designed to address common issues in multi-port chargers like throttling, overheating, and data security. It features independent channels that optimize charging current, data integrity protection against spyware on public USB outlets, and an OLED display showing system and charging performance. Its 3.2 power supply mode supports power-hungry single-board computers.
Parts used in the Four4 USB charger:
- Four4 multi-port USB charger unit
- OLED display module
- Independent USB output channels (4 ports)
- Internal power management circuitry supporting 8A per port
- Data integrity protection circuitry
- Enclosure sized 60 x 60 x 21 mm
- Input power connector supporting 4.7–5.5V
The more the electronic devices to charge, the more the multiple-port USB chargers to have, especially intelligent ones!

Yes, charging multiple devices at the same time can be very tiring; from having to deal with the mess of the plenty of cables and adapters needed for the different devices to hunting for free wall sockets and then to the inconveniences faced when trying to charge on a journey. But with multi-port USB chargers, things have really become much easier and faster!! However, while it seems like some have been able to fully satisfy the needs of people, others have not.
“The main reason the idea was brought to life is that I have never been satisfied with multi-port chargers. They are built with cheap components and lack functions that I believe are prerequisites for safe and smart charging. Many of them are told to deliver high power but when they are put to the feat, many of them fail in different aspects. Throttling the power outputs is most common, overheating or having very high voltage ripple are issues often found”, says Karoly Simon, Sweden-based designer of the Four4 multiple-port USB charger.
The Four4 USB charger design offers safety functions including data integrity protection that protects devices from data intrusion and harmful spyware when used in public USB outlets. The charger also has an OLED display that shows important system information as well as charging performance for charging optimization. All the channels of the charger are independent and each optimizes charging current to be as high as possible.
The Four4 is a perfect power supply for most SBCs too; its 3.2 power supply mode can satisfy the most power demanding board without disruption. Charger Specifications include:
- Input Voltage: 4.7 – 5.5V
- Output voltage: 5.3V
- Output current for each port: 8A
- Dimension: 60 x 60 x 21 mm (2.4 x 2.4 x 0.83 inch)
- Weight: 60 grams
Read more: FOUR PORTS INTELLIGENT AND HIGH POWERED CHARGER USB CHARGER
- What safety functions does the Four4 USB charger offer?
The charger offers data integrity protection that protects devices from data intrusion and harmful spyware when used in public USB outlets. - How does the Four4 optimize charging for multiple devices?
All channels are independent and each optimizes charging current to be as high as possible. - Does the Four4 have a display to show charging information?
Yes, it has an OLED display that shows important system information and charging performance for optimization. - Can the Four4 power single-board computers?
Yes, its 3.2 power supply mode can satisfy the most power demanding boards without disruption. - What is the input voltage range for the Four4?
The input voltage range is 4.7 to 5.5V. - What is the output voltage and current per port?
The output voltage is 5.3V and the output current for each port is 8A. - What are the physical dimensions and weight of the Four4?
The dimensions are 60 x 60 x 21 mm and it weighs 60 grams. - Why was the Four4 designed?
It was designed because existing multi-port chargers often use cheap components and lack necessary functions for safe and smart charging, leading to issues like throttling, overheating, and high voltage ripple.
