Wattage · Samsung's baseline
25W adapters: the number Samsung built a feature name on.
25W is not an Apple or a laptop number — it is the threshold for Samsung Super Fast Charging. A Galaxy will charge from almost anything, but it only shows the fast-charge notification when the adapter offers a genuine 25W profile.
What Super Fast Charging actually asks for
Samsung's 25W adapter (EP-TA800 and its successors) delivers 9V/2.77A as a fixed PD rail and adds a PPS profile on top. Super Fast Charging 1.0 is triggered when the phone finds a source capable of 25W over USB-C PD; the phone then rides a PPS range rather than a hard 9V step, adjusting in 20 mV increments as the cell warms. That is the difference between a Galaxy charging at 25W and the same Galaxy sitting at 15W on a generic brick that has watts but no PPS. Full mechanism: PPS explained.
Which Galaxy gets what
| Device | Peak input | 25W adapter verdict |
|---|---|---|
| Galaxy S25 / S24 / S23 (base) | 25W | Exactly right — nothing above this helps |
| Galaxy S-series Plus | ~45W on recent generations | Charges fast, but leaves speed on the table |
| Galaxy S Ultra | 45W with PPS | Falls back to 25W — see 45W |
| Galaxy A-series (mid-range) | 15–25W | At or above the device ceiling |
| Galaxy Tab S (standard) | 25W class | Correct match |
| Galaxy Buds / Watch | Under 10W | Overkill, entirely harmless |
Samsung's own brick is covered on the Samsung 25W adapter page, and the Ultra's extra step is broken down in 25W vs 45W for Samsung.
25W outside the Samsung world
For an iPhone, a 25W adapter is simply a 20W-class brick with headroom — the phone requests its own 9V rail and ignores the rest. A Pixel 9 tops out around 27W, so 25W is one small step short of its maximum. For iPads, earbuds and e-readers there is no difference at all. Buy 25W because you own a Galaxy; buy 30W if you want one adapter that covers everything at phone scale.
Picks at this wattage
- 25W
Samsung 25W USB-C Wall Charger
The reference part for Super Fast Charging: fixed 9V/2.77A plus the PPS range the phone actually rides. Sold with and without a cable — check which.
- Output
- 25W PD + PPS
- Port
- 1× USB-C
- Trigger
- Super Fast Charging
- 25W
25W-class PPS GaN charger
Class pick for third-party. The specification that matters is not the 25W but the printed PPS range; without it a Galaxy will not show Super Fast Charging.
- Output
- 25W with PPS
- Port
- 1× USB-C
- Look for
- PPS range printed
- 2-port
25W dual-port C+C charger
Class pick for a phone plus earbuds on one socket. Expect the total to split when both ports are loaded, dropping the phone below the Super Fast threshold.
- Output
- 25W total
- Ports
- 2× USB-C
- Caveat
- Splits when shared
Sizing up and stepping down
Step down to 18W only for older hardware; step up to 45W if you own an S Ultra, a Tab S Ultra or a Steam Deck, since that is the next real threshold rather than a marginal gain. 30W is the better generalist if your household mixes brands. Whatever you pick, the rule from can I use a higher-wattage charger holds: extra watts are never a risk, only unused capacity.
FAQ
Do I need Samsung's own 25W charger?
No, but you need one that offers PPS. Any 25W USB-C PD adapter with a published PPS range will trigger Super Fast Charging; a 25W adapter with fixed rails only will not.
Will a 45W charger charge my Galaxy S25 faster than 25W?
Not on the base model, which caps at 25W. On an S Ultra it does, because the Ultra implements Super Fast Charging 2.0 and rides a higher PPS current.
Is 25W enough for an iPhone?
Yes, comfortably. Standard iPhones peak near 20W and Pro models in the mid-20s, so a 25W adapter covers the whole line with a little headroom.