Why do we have higher-watt chargers? So, will higher-watt chargers be faster? Let me explain.
The main difference between a 25W and 45W charger is power output. If your device supports 45W USB-C charging, it can charge faster. But not every device can take full advantage of the extra wattage.
Let’s break down what really matters when choosing between these two common charging options — for both Samsung and Apple devices.
Power Output Comparison
| USB-C Charger | Max Wattage | Common Devices |
|---|---|---|
| 25W | 5V/3A, 9V/2.77A, 12V/2.08A, PPS 3.3V–5.9V 3A, 5.9V–11V 2.25A | Phones, tablets |
| 45W | 5V/3A, 9V/3A, 15V/3A, 20V/2.25A, PPS 3.3V–11V 3A, 5V–11V 4.5A | Phones, tablets, laptops |
Wattage shows how much power a charger can deliver. Higher wattage means faster charging — as long as the device supports it.
Charging Protocols
Both Samsung’s 25W and 45W chargers support Super Fast Charging, but only certain 45W models support Super Fast Charging 2.0, which requires PPS (Programmable Power Supply) and up to 4.5A current.
Are They Safe to Mix and Match?
Yes — using a 45W charger on a device designed for 25W is perfectly safe. Thanks to USB-PD and other smart charging protocols, your device will only draw the power it needs.
Example:
| Charger | Device | Power Draw | Safe? |
|---|---|---|---|
| 45W | Phone | 25W or less | ✅ Yes |
| 45W | Earbuds | <10W | ✅ Yes |
| 25W | Phone | Max 25W | ✅ Yes |
Real-World Speed Differences
The difference is most noticeable in the first 30 minutes of charging.
| Time Elapsed | 25W Charger | 45W Charger |
|---|---|---|
| 0–30 min | 50% | 65% |
| 0–60 min | 85% | 92% |
| Full Charge | ~75 min | ~60 min |
If you charge overnight, you won’t notice much difference. But for quick top-ups during the day, the extra power can save you precious minutes.
Apple: 20W vs 30W (and Why 45W Doesn’t Help Much)
Apple’s iPhones have their own rules when it comes to charging. While the iPhone 8 and later models support fast charging via USB-C Power Delivery, there’s a ceiling:
-
iPhone 15 / 14 / 13 / 12 series: Peak around 27W (for Pro/Pro Max models)
-
iPhone 15 Pro Max: Slight boost but still under 30W
-
iPads: Many support 30W+ charging, so higher-wattage adapters help more here
-
MacBooks: Need 30W–140W depending on model
Key point: A 45W charger won’t make your iPhone charge faster than a 30W charger — the phone simply won’t draw that extra power.
Apple Charging Speed Example (iPhone 15 Pro)
| Time Elapsed | 20W Charger | 30W Charger | 45W Charger |
|---|---|---|---|
| 0–30 min | 50% | 55% | 55% |
| 0–60 min | 80% | 85% | 85% |
| Full Charge | ~95 min | ~90 min | ~90 min |
For iPhones, 30W is the sweet spot. Higher wattage only helps if you also charge an iPad or MacBook.
Which Should You Choose?
For Samsung Users:
-
Galaxy S20/S21/S22/S23/S24 → 25W
-
Galaxy S22+/S23+/S24+/Ultra → 45W
-
Tablets → 45W
-
Laptops → 45W+
For Apple Users:
-
iPhone → 20W or 30W (30W preferred for Pro/Pro Max)
-
iPad → 30W+
-
MacBook → 30W–140W depending on model
Final Thoughts
-
25W (or 20W for Apple) is plenty for most smartphones.
-
45W (or 30W for Apple) is better if you need speed, travel often, or charge multiple high-power devices.
-
Always check for PPS if you want the fastest Samsung charging speeds.
-
With Apple, more watts won’t always mean more speed — but they will make your charger more versatile.
Recent Posts
Blog Tags
Tips to Extend the Battery Life and Capacity of Your Power Bank
Remember: avoid overcharging, control the temperature, use quality cables, and charge it regularly. Follow these steps, and your power bank will always be ready when you need it most.
mAh vs. Wh in Power Banks: What You Really Need to Know
✅ Final Takeaways
-
Don’t rely only on mAh — Wh tells the real story
-
Make sure your power bank is under 100 Wh if you plan to fly
-
Use the formula:
Wh = (mAh × V) ÷ 1000 -
Choose certified brands like RINECOPO for safe, reliable charging
Never Run Out of Power Again: The Best Portable Travel Chargers of 2025
When you're on the move, a dead device isn't just inconvenient—it can derail your entire trip. Whether you're flying long-haul, sightseeing all day, or working remotely, a reliable portable travel charger ensures your phone, tablet, or laptop stays powered up whenever and wherever you need it.
However, with so many options available, choosing the right power bank can be a daunting task. In this guide, we'll analyze the best travel-friendly chargers and help you understand which features really matter when you're on the go.
