Ruimi 3S Music Bluetooth Car Charger converts 12-24V car power to 5V 3400mA USB output for mobile phones and tablets, with a 26.5×26.5×61.3mm black compact design suitable for 0-45℃ working temperatures.
Ruimi 3S Car USB Charger: 5V 3400mA Power for Mobile Devices

Keep your mobile phone or tablet powered during car journeys with the Ruimi 3S Car USB Charger. This compact device plugs into your vehicle's standard 12V or 24V power outlet (commonly known as the cigarette lighter socket) and converts that power to a stable 5V DC output. Delivering up to 3400 milliamps of current, it provides a practical charging solution for a range of portable electronics. Designed to function in a wide range of temperatures, from 0 to 45 degrees Celsius, it offers reliable performance in both cold winter mornings and warm summer conditions. Its small, black form factor is built to be unobtrusive in the cabin.
Features and Construction

The Ruimi 3S focuses on delivering essential power conversion for in-vehicle use. Its specifications define its capability and physical profile, providing clear parameters for its operation and fit.
Material and Build
The source information details the charger's electrical performance and size but does not specify the materials used for its external casing or internal components. The construction is centred around its primary function: accepting a 12-24V DC input from the car and providing a regulated 5V DC output through a standard USB port. The model is identified as the Ruimi 3S and is finished in a black colour.
Size and Practical Fit
With dimensions of 26.5 millimetres in width, 26.5 millimetres in depth, and 61.3 millimetres in height, the charger has a compact, cubic design. This small size allows it to sit flush in most vehicle power outlets without protruding excessively, reducing the risk of accidental knocks or obstruction. The stated size indicates it is designed for discreet installation.
Uses and Placement

This charger is designed for a specific environment and set of devices. Its value comes from providing power where it is needed during travel, without requiring complex setup or installation.
Event or Professional Use
For professionals who spend significant time on the road, such as delivery drivers, sales representatives, or tradespeople, maintaining device battery life is crucial. The Ruimi 3S charger allows for continuous use of navigation apps, job management software, or communication tools by powering the device directly from the vehicle. Its broad 0-45℃ operating range ensures it works in vehicles parked in the sun or in colder conditions.
Everyday Home Use
For everyday drivers and families, the charger provides a simple solution for keeping personal devices charged during commutes, school runs, or longer trips. It can power a passenger's mobile phone or tablet, supporting entertainment, reading, or communication. The high 3400mA output current is suitable for modern smartphones and smaller tablets that support faster charging via USB.
Benefits and Buying Value

The value of this product lies in its defined performance within a common scenario: needing power in a car. Its specifications provide clear expectations for what it can do.
Reuse and Low Maintenance
As a solid-state electronic device with no moving parts, the charger requires no routine maintenance. It is designed for repeated use every time you enter the vehicle. The lack of specified complex care instructions suggests it is a simple plug-and-use accessory. Its durability is defined by its stated working temperature limits.
Why Choose This Product
Choosing the Ruimi 3S is based on its match to your specific needs: a charger that works with your car's 12V or 24V system, outputs 5V at 3400mA for your devices, and fits a compact space. It provides a factual, no-frills power conversion function. The decision hinges on whether these electrical specifications and the compact 26.5mm cube size meet your requirements for a car USB charger.
