Buying a phone charger wasn’t even something you had to think about back when brands were nice enough to include one in the box. Those days are mostly gone. And if you’ve gone charger shopping recently, you probably know how confusing it can get with all those wattage numbers and acronyms like PD, PPS, and GaN. I’ve been there too. But once you know what they each mean, picking the right charger gets a lot simpler.

The truth is, most chargers will power your phone. But there’s a big difference between merely charging a device and charging it efficiently, safely, and quickly. To make the right choice, you need to understand the technology behind the brick. This guide walks through the essential terms, debunks common myths about wattage, and explains why cables and brands matter just as much as the charger itself.

Buying the right phone charger can be confusing

It’s no longer just about USB-A or USB-C

The biggest reason why buying a charger can be confusing is that almost every charger will technically work with your phone. It’s no longer just about getting a charger with the right port. Yes, USB-C is everywhere, and it should’ve simplified things — but that hasn't happened. That means even if two chargers look identical, they might perform completely differently.

You can use a 5W charger from five years ago, and your phone will still charge. But “works” and “works correctly” aren’t the same thing here. Beyond wattage, you need to see if the charger supports advanced charging tech like PD, PPS, and GaN. Again, your phone still will charge without these, but you might be leaving a ton of speed on the table, or paying a premium for wattage your phone can’t even use.

In the past, charging was simple. Each phone shipped with a proprietary charger, and you didn't need to think about compatibility. Now, with fast-charging standards evolving rapidly, the market is flooded with options that range from tiny 20W adapters to massive 140W laptop bricks. Add in multi-port hubs and wireless charging pads, and it’s easy to feel overwhelmed. Understanding a handful of key terms can cut through that confusion and save you money in the long run.

USB PD, PPS, QC, and GaN all mean different things

A plain-English breakdown of each term

When buying a charger, you’ll run into terms like PD, PPS, QC, and GaN on them. Each one essentially tells you what's special about the brick. They fall into two categories: communication protocols and internal technology. Understanding both can help you match a charger to your device’s needs.

USB Power Delivery (USB PD) is a charging standard that lets a charger and your phone negotiate how much power gets delivered. So instead of supplying a fixed voltage, the charger and device can talk to each other and agree on the safest, fastest combination. Almost every modern Android phone supports it, and it’s the reason why some chargers can fast charge your phone, laptop, and even a pair of earbuds without frying any of them. USB PD has gone through several revisions, with the latest supporting up to 240W for demanding devices like gaming laptops. It works over USB-C connections, which is why most new chargers now feature USB-C ports as standard.

Programmable Power Supply (PPS) does the same thing as USB PD, but slightly better. Instead of adjusting the power in phases, it does it continuously. That means a PPS charger can keep the heat low and efficiency high, which is good for long-term battery health. PPS is an extension of the USB PD standard, and it’s especially useful for Samsung phones and Google Pixel devices, which rely on PPS to reach their peak charging speeds. A PPS charger can fine-tune voltage in tiny increments, ensuring the battery receives exactly what it needs at any moment. This reduces stress and heat buildup, both of which are major enemies of battery longevity.

Then there are proprietary technologies from different companies. For instance, Qualcomm has Quick Charge (QC) for phones running Snapdragon chips (though it is licensable by non-Snapdragon devices), and it comes in different versions, so you want to pick the highest one your phone supports. QC 4.0 and 4.0+ are compatible with USB PD, making them more versatile. However, older QC versions use their own protocol, and pairing them with a non-QC charger may result in slower charging or no fast charging at all. Phone brands have their own protocols, like OPPO's SuperVOOC and Motorola’s TurboPower. These typically need both the charger and the phone to be from the same brand to get those advertised charging speeds. While proprietary protocols can be incredibly fast, they often limit you to buying chargers from the same manufacturer, which can be inconvenient if you travel or share chargers among devices.

Gallium Nitride (GaN) is a different thing entirely. It’s not related to a charging protocol but rather the material used inside the charger itself. Traditional chargers use silicon components, but GaN chargers use a newer semiconductor that runs more efficiently and generates less heat. The obvious benefit of this is a charger that’s significantly smaller and lighter for the same wattage. GaN chargers can also handle higher power levels without bulking up, which is why you now see 65W and 100W chargers that are barely larger than a deck of cards. Without GaN, achieving that kind of power output would require a much bulkier, heavier brick. That makes GaN a fantastic choice for travelers and anyone who wants to minimize cable clutter.

Another emerging term you might see is Qi2, which is a wireless charging standard based on Apple’s MagSafe technology. While it doesn’t relate to wired chargers, it’s worth mentioning because it promises faster, more efficient wireless charging with better alignment. If you prefer cable-free charging, look for a charger and phone that both support Qi2 to get the best experience.

More watts don’t always mean faster charging

Stop chasing the highest number

This is probably the most common mistake people make when buying a charger. Wattage isn’t something the charger decides alone. Your phone has a maximum charging rate built into it, and it’ll never exceed that, no matter what you plug in. For instance, my Galaxy S26 tops out at 25W, which means there’s no point in buying a 45W charger. It’ll be as effective as a 25W one.

There’s another wrinkle. The wattage you see mentioned on the charger’s box is a maximum output, not a guarantee of what each device will get. So if you get one of those multi-port chargers, don’t expect it to charge all your devices at the maximum rate mentioned on the box. The charger will split the output between connected devices, and the exact split depends on the charger itself. For example, a 65W charger with two USB-C ports might deliver 60W through one port when used alone, but only 30W per port when both are in use. Some chargers have more intelligent power sharing, so it’s worth checking the specs before you buy if you plan to charge multiple devices simultaneously.

So the short version is, check your phone’s max charging wattage first, then buy a charger that matches it. Most smartphones display their charging speed in the settings menu, or you can find the official figure on the manufacturer’s website. Matching the charger’s output to the phone’s requirement ensures you get optimal charging without overspending. A 25W charger will completely satisfy a phone that maxes out at 25W, even if the charger itself is rated for 65W and your laptop could use the extra power later.

Additionally, keep in mind that charging speed isn’t linear. A phone might advertise 120W fast charging, but that peak speed only lasts for a few minutes before the phone gradually reduces power to protect the battery. Many phones can charge from 0% to 50% in under 20 minutes, but reaching 100% takes much longer because the charging rate drops significantly toward the end. This is a deliberate safety measure, and it means that buying a charger with ridiculous wattage often yields minimal real-world benefit.

The cable matters just as much

You can buy the perfect charger and still end up with slow charging if the cable doesn’t keep up. If your phone and charger are both capable of 65W, but the cable maxes out at 15W, that’s what you’ll get. This usually isn’t a problem, since most manufacturers still include the cable inside the box (at least for now). But yes, if you’re using a spare one for your office or travel bag, don’t just grab a random USB-C cable. Not all USB-C cables are created equal. Some are designed only for data transfer, while others support high-speed charging. Look for cables that explicitly support USB PD or high wattage ratings. Also, be wary of cables that are extremely long, as voltage drop over distance can reduce charging efficiency. A good rule of thumb is to use the cable that came with your phone or purchase one from a reputable brand that lists its power-handling capabilities.

There’s also the issue of certification. A cable might claim to support 100W, but if it lacks proper shielding or uses thin gauge wire, it could overheat or fail to deliver the promised power. In some cases, a low-quality cable can even damage your phone’s charging port or battery. Spending a little extra on a well-reviewed, certified cable is worth the peace of mind.

Why brand reputation matters

Finally, with both the charger and the cable, stick to a reputable brand. You might find a no-name charging brick or cable with the same specs on the packaging, but you’ll have to take their word for it. There’s a lot that these cheap chargers leave out, and it’s not worth saving a few bucks to find out. Known brands invest in safety features like overheat protection, short-circuit protection, and foreign object detection. They also comply with global safety standards such as UL, CE, or FCC certifications. No-name chargers often skip these protections to cut costs, and that can lead to catastrophic failures, including fires.

Furthermore, reputable brands tend to honor their warranties and offer customer support. If a charger fails after a few months, you can get a replacement. With a generic charger, you’re on your own. In an era where many phones no longer include chargers in the box, buying a high-quality charger is an investment that should last for years across multiple devices. Combined with a durable cable, a good charger from a trusted brand will serve you well without the risk of damaging your expensive smartphone.

In the end, the key to buying the right charger is understanding that you’re not just buying a lump of plastic with a wire. The technology matters. USB PD and PPS determine how intelligently power is delivered, while GaN determines how efficient and compact the hardware can be. Wattage is important only when it matches the needs of your phone. And the cable is what carries all that carefully negotiated power to your device. When you consider all these factors together, the once-confusing world of chargers becomes remarkably simple. You just need to know what you’re looking for and why each acronym matters.

Source: MakeUseOf News