By type · Phone plus one
2-port adapters: the traveller's phone-and-tablet brick.
Two ports is the port count most people should buy. It stays wall-plug sized, it covers a phone plus one companion device, and the split is shallow enough that neither device crawls — provided you read the split table rather than the headline number.
The split is the spec
A 2-port adapter has one power budget and hands it to whichever ports are occupied, following a fixed table burned into the controller. Nothing is dynamic beyond that table. Here is how the common ratings behave.
| Rated total | Port 1 alone | Both ports active | Reads as |
|---|---|---|---|
| 35W dual C | 35W | 17.5W + 17.5W | An even split — Apple's dual-port behaviour |
| 40W-class dual C | Full rating on one port | 20W + 20W typical | Even split, more headroom solo |
| 45W dual C | 45W | 25W + 20W | Slightly favours port 1 |
| 65W dual C | 65W | 45W + 20W | The classic laptop-plus-phone split |
| 100W dual C | 100W | 65W + 30W | Laptop keeps ultrabook speed with a tablet attached |
Read that table in the direction that matters: a 65W 2-port is not a 65W laptop charger once a phone is plugged in — it is a 45W one. If your laptop wants 65W sustained, either buy the 100W version or accept slower charging while the phone is attached. Even splits like Apple's 17.5W pair are the honest design for two similar devices and the wrong design for a laptop.
Who two ports actually suits
The phone-and-tablet traveller. One brick in the bag, an iPhone at 20W and an iPad at 20–30W simultaneously off a 45W or 65W unit, nothing left behind in a hotel room. This is the single most common charging pattern outside a desk, and it is exactly what two ports was designed for.
The bedside pair. Phone plus watch, or phone plus earbuds. Total draw rarely exceeds 30W, so a 35W dual-C unit with an even split is ideal and the small body does not block the second outlet.
The two-person hotel room. Two phones, one plug, no argument. Even splits win here too.
Where two ports stops being enough is the moment a laptop joins permanently — that is the 3-port travel kit — or the moment the charger stops moving, which is the 4-port desk hub. The wider case for and against multiple ports is at single versus multi-port and 2-port versus 4-port.
2-port adapters worth buying
- 35W
Apple 35W Dual USB-C Compact
The even-split option: 17.5W to each port. Ideal for iPhone plus Watch or AirPods, wrong for a laptop.
- Total
- 35W shared
- Split
- 17.5W + 17.5W
- Ports
- 2× USB-C
- 45W
45W-Class Dual USB-C GaN
The Samsung answer: enough for a Galaxy S Ultra at 45W solo, with PPS, and a second port for a companion.
- Total
- 45W shared
- Protocol
- PD + PPS
- Ports
- 2× USB-C
- 65W
65W-Class Dual USB-C GaN
The travel default: an ultrabook at 45W with a phone attached, or the full 65W when it is alone.
- Total
- 65W shared
- Split
- 45W + 20W typical
- Ports
- 2× USB-C
Ranked picks are at best dual-port chargers. If you are unsure which total to buy, work it out from your biggest device with the wattage guide, then confirm the format on the wall adapter page and browse the rest from the type index.
FAQ
Does plugging in a second device slow the first one?
Yes, and it happens the instant the second cable goes in. The controller re-runs its split table and renegotiates both contracts, which is also why a laptop briefly flashes to battery when you attach a phone. The new figure holds until the second device is removed.
Is a 65W 2-port enough for a MacBook Air?
Alone, comfortably. With a phone on the second port it typically drops to 45W, which still charges an Air but more slowly and without the fast-charge behaviour. If you want both at full speed, buy the 100W version.
Are two USB-C ports better than one C and one A?
For anything bought recently, yes — the A port cannot do Power Delivery and caps around 12 to 18W. Choose C plus A only if you genuinely rely on legacy cables you do not want to replace.