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.

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.

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.

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.

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. The continuous voltage adjustment allows the charger to match the exact needs of the battery during different charging stages, reducing stress and prolonging its lifespan. This is why PPS is often used by phone makers like Samsung with its Super Fast Charging, which requires PPS support to reach full speeds.

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 has been around for years, and while it's been largely superseded by USB PD and PPS on many modern phones, it's still common on budget and mid-range devices. 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.

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. But there's more to it than just size. Because GaN components can switch at much higher frequencies, chargers can use smaller transformers and capacitors, which is what allows the compact designs we see today. GaN chargers are also generally more durable and can handle higher temperatures, making them a better long-term investment. The technology has matured rapidly over the past few years, and prices have dropped enough that GaN chargers are now affordable for most people.

When you understand these terms, you can start to see why a cheap charger might not be such a bargain. A charger that says it supports PD and PPS has been tested to safely communicate with your device. One that doesn't might simply blast a fixed voltage, which can be slower and potentially generate more heat. GaN is more about the physical design and efficiency than the charging protocol, so you'll often see GaN chargers that also support PD and PPS. The combination is what makes the charger both small and smart.

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. In fact,, it might even be slightly worse if the 45W charger is larger and heavier for no benefit.

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. Some chargers might give one port 45W and the other 20W, while others might split it evenly. The most flexible chargers can dynamically adjust the power distribution based on what's plugged in, prioritizing a laptop over a phone, for instance. But the box will only list a single maximum number, and you have to dig deeper into the specs to understand how the ports share the load.

So the short version is, check your phone's max charging wattage first, then buy a charger that matches it. Don't fall for the marketing hype of 120W or 200W chargers if your phone can only accept 18W. The extra wattage is simply unused, and you're paying for capability you'll never use. Conversely, if you plan on charging a laptop and a phone simultaneously, you'll want a higher-wattage charger with intelligent power sharing.

It's also worth considering the future. If you're buying a charger that you hope to keep for several years, it makes sense to buy one that can handle the demands of future devices. Laptop power adapters have traditionally been 45W or 65W, but newer laptops are pushing higher. And as phones keep increasing their charging speeds, a 65W GaN charger will likely be useful for a long time, even if your current phone only needs 25W. This is why many people buy a 65W GaN charger even for a relatively low-power phone — it gives them flexibility to charge other devices as well.

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.

Cables have their own wattage and data transfer ratings, and they're not all created equal. A cable that looks identical on the outside can support anywhere from 3A to 5A of current, which translates to different maximum wattages. For USB-C to USB-C cables, look for ones that support 100W or 240W using the Extended Power Range (EPR) spec, especially if you plan to charge laptops. Also, keep in mind that some cables contain a chip called e-marker that tells the charger how much power they can safely carry. Cheap cables might not have this chip, which can cause the charger to default to a lower voltage or even a safer but slower charging mode.

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. Reputable brands test their products for safety and reliability, and they include the necessary protection circuitry to prevent overcharging, overheating, and short circuits. They also provide clear specifications, which makes it much easier to determine whether the charger will work with your phone or laptop. No-name brands often exaggerate their specs or fail to include critical safety features, and they might not comply with modern USB standards. The money you save upfront could be lost when a faulty charger damages your expensive phone or, worse, becomes a fire hazard. When it comes to electrical devices, it's better to be safe than sorry.

Understanding what those acronyms and numbers mean will completely change how you buy chargers. You'll stop overpaying for charging speed your phone can't even use, and you'll avoid the frustration of a charger that fails to fast charge your device. You'll also be able to choose a charger that's genuinely future-proof, one that can handle your phone, tablet, earbuds, and even laptop with a single compact brick. It also helps to store your chargers properly and use cable clips or ties to prevent fraying. A good charger can last many years, so it's worth the investment to choose wisely from the start. Once you know the difference between PD, PPS, QC, and GaN, charger shopping becomes a much simpler and more rewarding experience.

Source: MakeUseOf News