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 have 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.

Historically, chargers were simple: a fixed voltage and current, usually 5V at 1A or 2A. But as phones gained larger batteries and faster processors, users demanded quicker top-ups. Manufacturers responded with proprietary fast-charging standards, leading to the alphabet soup we see today. Understanding the technology behind these acronyms is essential to making an informed purchase.

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. The USB Implementers Forum (USB-IF) developed this standard to create a universal power delivery system, and it has become the foundation for most fast charging today. USB PD can handle up to 240W under the latest revision, though most consumer chargers top out at 100W or 140W. This flexibility allows a single charger to power a laptop at 60W and then switch to 18W for a phone when plugged in together.

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 USB PD (specifically PD 3.0) that allows for fine-grained voltage control in 20mV steps. This is particularly beneficial for devices like Samsung Galaxy phones and Google Pixels, which use PPS to optimize charging curves. For example, Samsung's 45W charging relies on PPS to deliver peak speeds without overheating. Without PPS, a standard PD charger might only achieve 25W on the same device.

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 5.0 can deliver up to 100W and is backward-compatible with older QC standards. 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. SuperVOOC uses a high-voltage, low-current approach that can charge a 4,500mAh battery to 100% in under 30 minutes. However, if you plug a SuperVOOC phone into a standard PD charger, you'll get only 15W to 18W, which is dramatically slower.

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 transistors can switch at higher frequencies, allowing for smaller transformers and capacitors in the power supply. This is why a 65W GaN charger can be the size of a traditional 30W silicon charger. Companies like Anker, Aukey, and Belkin have popularized GaN technology, making it affordable for everyday consumers. The reduced heat also means less thermal stress on internal components, potentially extending the charger's lifespan.

In addition to these, there is also USB PD 3.1 which introduced Extended Power Range (EPR) up to 240W, aimed at gaming laptops and high-end workstations. While rare in phones, it's worth noting for future-proofing. Similarly, MediaTek Pump Express and Huawei SuperCharge are other proprietary standards you might encounter, each with its own compatibility quirks.

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. The same applies to iPhones: the iPhone 16 Pro Max peaks at around 27W, so a 100W charger offers no speed advantage over a 30W model.

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 dual-port charger might deliver 45W on one port and 20W on the other when both are in use, rather than 65W each. So the short version is, check your phone's max charging wattage first, then buy a charger that matches it.

How do you find your phone's maximum charging wattage? Check the manufacturer's specifications on the official website, or look up reviews from reputable tech outlets. Alternatively, you can use apps like Ampere or AccuBattery on Android to monitor the actual charging rate. Many phones also display a "Super Fast Charging" or "Fast Charging" indicator when the correct charger is detected, which is a useful real-time cue.

Another common misunderstanding is that higher wattage will charge your phone from 0% to 100% faster in all scenarios. In reality, most phones use a constant-current/constant-voltage (CC/CV) charging curve: they accept maximum power up to about 70-80%, then taper off to protect the battery. So even if your phone supports 65W, the last 20% may take as long as the first 80%. Buying a charger with watts far above your phone's peak simply wastes money and space.

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. Look for cables that specify support for 100W or 240W PD, or ones that are marked as "USB-IF certified." Cables with e-marker chips can communicate their power rating to the charger, ensuring safe and optimal delivery.

Also be aware of cable length: longer cables (over 2 meters) may have slightly higher resistance and could reduce charging speed slightly, especially at high currents. For fastest charging, use a cable rated for the wattage you need and keep it under 1.5 meters. Avoid cheap cables that lack proper shielding or use thin gauge wires, as they can overheat or even damage your devices.

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. Counterfeit chargers often lack safety certifications like UL, ETL, or CE, meaning they may skip over-voltage protection, over-current protection, and temperature regulation. This can lead to slow charging, battery damage, or even fire hazards. Investing in a trusted brand like Anker, Spigen, Belkin, or the phone manufacturer's own charger ensures both performance and safety.

In summary, the key to buying the right charger is understanding what your phone needs and matching that with the appropriate technology. Don't be swayed by high wattages alone; check for PD/PPS compatibility, consider GaN for portability, and never forget that the cable is half the equation. With this knowledge, you'll stop buying the wrong charger and start charging smarter, faster, and safer.

Source:MakeUseOf News