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The Facts About USB-C Chargers & USB-C Cables


A Rock black USB-C or USB C cable lying on a rock, a close up image of a USB C cable outdoors
The Facts About USB-C and USB-C Charging

USB Type-C is the go-to connection for all modern tech, from smartphones, tablets to laptops, gaming devices, speakers and headphones. It's designed to simplify our tech lives: one port, one cable, one power supply for everything. But, as with many things in tech, the reality is a bit more complex.


USB-C, Not All Are Created Equal

Not every USB-C power supply suits every device. Read on to find out the facts about USB-C Chargers & USB-C Cables. Not all Type USB-C ports can charge devices quickly—or at all, plus not every Type USB-C cable guarantees reliable power transmission. The Rock blog breaks down the differences of USB-C charging and recommends the best chargers and cables for your tech.


USB Type-C: The Universal Charging Champ

Nearly all mobile devices now charge via USB Type-C. Apple was the last major holdout but switched from their Lightning connector to USB-C with the iPhone 15. Cheap bargain smartphones might still use micro USB, but the future is USB-C. The same goes for tablets; Apple’s iPad line-up switched to USB-C years ago.

Laptops are a bit more diverse. While many newer models charge via USB-C, powerful gaming and multimedia laptops often have a dedicated power connection for higher charging capacity. Business laptops might still include the traditional barrel connector to maintain compatibility with older power supplies.


Power Delivery: The Secret of USB-C Charging

The USB Power Delivery (PD) standard is the magic behind USB-C charging. It handles voltage levels from 5 to 48 volts and currents of 3 or 5 amps, allowing for charging capacities from 10 watts to a whopping 240 watts.

Here’s how it works:

  1. Before charging begins, your charger/power bank and device have a little chat to decide on the best voltage and current.

  2. The charger checks the cable’s capacity, starts with a base voltage of 5 volts, and then negotiates the optimal settings for your device.


Why USB-C Wins

USB-C comes with some awesome perks:

  • The reversible connector means no more guessing which way to plug it in.

  • The compact design allows for sleeker, more stylish devices.

  • One cable for data, video, and charging.

Speed Up Your Charging with USB-C

USB-C supports faster charging via the USB Power Delivery (PD) protocol, which can deliver up to 240 watts. But remember, not all USB-C chargers and cables are built to handle such high wattage. Mobile chargers usually range from 12 watts to around 60 watts. The higher the wattage, the faster the charge—and usually, the higher the price.


Rock navy blue usb c cable on a white rock background
Rock Navy USB C cable for fast USB C charging

Choosing the Perfect USB-C Charger

To get the best charging experience, follow these tips:

  • Check Compatibility: Make sure both the charger and your device support USB Power Delivery (PD). Look for labels like “PD” (Power Delivery) or “PPS” (Programmable Power Supply).

  • Pick the Right Wattage: Laptops need more power than smartphones or tablets. Ultra-mobile laptops typically need 45 watts, standard laptops may need 60 watts, and powerful laptops might require up to 100 watts. For smartphones, anything from 12 watts to 60 watts will do.

  • Multiple Devices: A charger or power bank with multiple ports is handy for charging several devices at once.

Multi-Port Chargers: Simultaneously Charge At The Same Time

For charging multiple devices at once, consider a charger or power bank with multiple USB-C and USB-A ports. Rock offers a range of chargers that safely power your devices. Choose one that supports USB PD (Power Delivery) or PPS (Programmable Power Supply). GaN (Gallium Nitride) chargers are the latest tech—they’re efficient, compact, and perfect for high-capacity charging without overheating.


Keep in mind how the power is distributed across the ports. For example, a 65-watt charger might only deliver full power if one USB-C port is used. Adding another device will split the power, slowing down the charge from each port. Always check how power is divided among the ports, especially for high-power devices like tablets.


Rock’s USB-C Rundown

Understanding the ins and outs of USB-C charging helps you choose the best cables, chargers, or power banks to keep your devices powered up. Whether you’re a gamer, business pro, or just a tech enthusiast, the right combination of cables and chargers makes a big difference. Want to see our full range of cables Visit us here and chargers and power banks Visit us here

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