Compare · Tablet and handheld class
30W vs 45W: the PPS line.
The 15 watts are the smaller half of this story. The bigger one is that 45W is where PPS becomes standard equipment — and PPS is what a Galaxy S Ultra, a Tab Ultra and most fast-charging Android phones need before they will run at full speed.
Spec sheet, side by side
| 30W | 45W | |
|---|---|---|
| Fixed rails | 5V, 9V, 15V, 20V/1.5A | 5V, 9V, 15V, 20V/2.25A |
| PPS | Rare at this class | Standard — typically a 3.3–21V programmable range |
| Ports | 1× USB-C usually | 1–2 ports, often 1× C + 1× A |
| Size class | Smallest GaN bodies | Slightly larger, still pocketable |
| Cable needed | Any USB-C cable | 5A cable for Samsung's full 45W |
| Best-suited devices | iPhone, iPad, MacBook Air baseline | + Galaxy S/Tab Ultra, Steam Deck (45W), Switch dock duty |
Where each one wins
30W wins on size and on Apple-only households. No Apple device below the MacBook Pro benefits from 45W: an iPhone peaks around 20–27W, an iPad Pro around 30W, and a MacBook Air treats 30W as its shipped baseline. If that describes your bag, the 45W unit is bulk you carry for nothing.
45W wins on Android and on handhelds. Samsung's Super Fast Charging 2.0 tops out at 45W and only engages when the adapter offers a PPS range — a plain 45W PD brick without PPS drops the phone back to 25W-class speeds. A Steam Deck asks for 45W flat. A Nintendo Switch dock wants 39W at 15V/2.6A, comfortably inside 45W but above what a 30W unit can guarantee alongside anything else. Details: 30W adapters, 45W adapters, and PPS explained.
Verdict: 45W if any Android or handheld is involved, 30W if not
This one splits cleanly on device, not on price. Own a Galaxy S24/S25 Ultra, a Galaxy Tab, a Pixel, a Steam Deck or a docked Switch? Buy 45W with PPS; the extra cost per watt is small and without it you simply cannot reach the speeds those devices advertise. Own only iPhones, iPads and a MacBook Air? Buy 30W and pocket the size saving — you would be paying for a rail nothing in your bag requests. For the reader who wants one adapter to stop the question recurring, the honest answer is neither: go to 45W vs 65W, because 65W covers both worlds and laptops too.
- 30W
Anker Nano 30W
The 30W side. Smallest sensible body, folding plug, full iPhone and iPad speed.
- Output
- 30W USB-C PD
- Ports
- 1× USB-C
- Tech
- GaN
- 45W
Samsung 45W Power Adapter
The 45W side, and the reference PPS implementation for Galaxy Super Fast Charging 2.0.
- Output
- 45W PD/PPS
- Ports
- 1× USB-C
- Cable
- 5A cable included
- 65W
Statik 65W GaN 3-Port
The compromise that ends the argument: PPS-class Android speed plus laptop headroom.
- Output
- 65W total
- Ports
- 2× C, 1× A
- Tech
- GaN
Samsung-specific numbers are on the Samsung 45W page; every head-to-head is indexed at charger comparisons.
FAQ
Will a 45W charger charge my iPhone faster than a 30W one?
No. The iPhone requests around 20 to 27W and stops there. The 45W adapter's advantage is entirely on Android phones with PPS, tablets, and handhelds like the Steam Deck.
Does a Galaxy S Ultra need Samsung's own 45W adapter?
Not the brand, but the spec. Any 45W adapter that advertises a PPS programmable voltage range will trigger Super Fast Charging 2.0, provided you use a 5A-rated cable.
Is 45W enough for a laptop?
For an ultrabook or MacBook Air, yes, at normal speed. For a MacBook Pro it is a trickle charge that will lose ground under heavy load — 65W is the sensible laptop floor.