USB-C and USB A wall charger (UK), 32/30W difference?

[MrMister111]

Looking for a UK wall charger. Found Belkin, supposedly good make, also sold in Apple stores.

So there is 2 versions, a 30W and 32W one. The USB-C port either does 18W or 20W respectively. What difference is this? Why have they done this?

Is it because Apple upped their wall charger from 18W to 20W for MagSafe?

If so it won’t make a difference for me really as it’s for travel or home.

I like the idea of both posts for flexibility and the ability of using both to charge at same time and getting 18W and 12W together. The USB-C is power delivery for fast charge as well, can’t imagine much difference between fast charge 18W or 20W?

The 32W is so hard to find though, so just wondering if should get the 30W. Anyone help on why please.

Looked at the Native union smart charger, they do a 18W or 20W but that’s shared between the 2 ports, so not as good.

30W USB-C Power Delivery Wall Charger | Belkin

This 32W charger features a USB-C Power Delivery port that fast charges compatible devices from 0-50% in just 30 mins. Includes a 12W USB-A port. View now.

www.belkin.com

 

[MrMister111]

No difference then…?

 

[1rottenapple]

For an iPhone 12.
32 vs 30 you’ll get the same 20watt charge so it. Doesn’t matter. Hell I use my 100watt usb-c max charger with lightning to charge my phone and it’s the same speed.

 

[MrMister111]

For an iPhone 12.
32 vs 30 you’ll get the same 20watt charge so it. Doesn’t matter. Hell I use my 100watt usb-c max charger with lightning to charge my phone and it’s the same speed.

The charger I’m on about doesn’t provide 32/30W from the individual USB-C port though as the total 32/30W is shared between the USB-C and USB A port. I think the USB-C port is maxed at 18/20W depending on version. I can’t imagine that 18/20W would be that much difference.

I was wondering why this was changed though, Apple also did on their own USB-C charger. They used to sell an 18W, and included it with the iPad Pro FaceID, but now use 20W version.

 

[1rottenapple]

They probably made the 20w to advertise 30min in 50% and avoid some lawsuits that says apple failed to provide correct charge rates. Heck timmy sneezes he gets sued for 60 million.

I watch a YouTube video where 18w and 20w is negligible. The 18w will charge 12 series fast. 18 w will charge my 11 and 12.9 iPad Pro, and it’ll charge my 16in MacBook (slowly)

tldr: buy the item

 

[RobM_]

It'll be down to specific USB-C PD voltage profiles I imagine, and how they differ from USB 2.0 and 3.0 standards used on the USB-A port.

USB 2.0 and 3.0 top-out at 5v, so the 20w option could be 5v*4a, which differs from the closest USB-C PD option of 9v*2a for 18w.

USB-C PD 3.0 supports much higher voltage (up to 20v) and currently a max of 100w, so within that a PD charger could support a multitude of profiles which the connecting device can negotiate to use upon connection.

 

[MrMister111]

Even this official Apple document says it needs 20W now to fast charge for iPhone 12. Sure it was advertised as 18W for iPhones before the 12?

Fast charge your iPhone – Apple Support (UK)

Fast charge some iPhone models.

support.apple.com

 

[magicMac]

Even this official Apple document says it needs 20W now to fast charge for iPhone 12. Sure it was advertised as 18W for iPhones before the 12?

Fast charge your iPhone – Apple Support (UK)

Fast charge some iPhone models.

support.apple.com

I believe the pro Max is the only one to really take advantage of 20W (9V, 2.22A) - it uses this power for longer - the standard size 12 and 12 mini might use it as well, but for not very long - I have seen videos where the phone soon drops down to pulling 18W, or even just starts off at 18W if the phone is even remotely warm. 18W will still fast charge an iPhone 12 with a total charge time almost exactly the same - I know this because I have a Belkin 18W charger and I have timed it against the 20W charger that came with my iPad. Keep in mind all fast chargers and all phones that support fast charge dont charge at this speed from beginning to end, once the phone has got to 80% battery you might as well plug a 5-10W charger in and you’ll get the same charge speed.

When it comes to fast charging the iPhone, I think what matters is the PD version being version 3, at least for MagSafe to do the full 15W speed anyway. For the lightning port I’ve had no issues using older 18W USB-C chargers to fast charge the iPhone 12.