Do we have to have 20W or is 18W charger ok?

[eclipse01]

What is a good app to test how many watts a charger is putting out?

 

[edhchoe]

What is a good app to test how many watts a charger is putting out?

I am using Watts lite

 

[eclipse01]

Have we confirmed that using a 18W charger will result in slower charging speeds vs a 20w?

 

[Debi Martocci]

apples website specifically states a 20w charger or higher is needed for fast charging the iphone 12 series https://support.apple.com/en-us/HT2...ter that supports USB Power Delivery (USB-PD)

Also this video explains why

 

[darthbane2k]

apples website specifically states a 20w charger or higher is needed for fast charging the iphone 12 series https://support.apple.com/en-us/HT208137#:~:text=Fast charging works when you use an Apple,power adapter that supports USB Power Delivery (USB-PD)

Also this video explains why

‘A’ 20w charger or APPLES 20W charger? I’m hearing the only way you can get those speeds is with apples, and that has been done by design

 

[Daannnyyyyyy]

Anker is 20w and RAVpower is 30w.
Output to my iPhone 12 is the same. 10.5w up to 80%.
7.85 w from 80%.
2.2w measured at 96%.
Temperature gets up to 95°F on the MagSafe and on the back of the iPhone near the power button.

I am not getting 15w as advertised.

View attachment 973502

What app that?

 

[edhchoe]

What app that?

Watts Lite

 

[Daannnyyyyyy]

Watts Lite

Thanks dude how does it work? Downloaded do you have to leave the app open when charging

 

[edhchoe]

Thanks dude how does it work? Downloaded do you have to leave the app open when charging

Yes. It typically takes 3-4 minutes

 

[Wyvernspirit]

I have a Third Party 18w USB C (and USB A) plug and a 30w one as well. Im going to test the charge rate on both using that app after work. Ill get bak to this with my findings. if the numbers don't get close to 15w I may try getting an official 20w plug to do the test with as well.

 

[Arctic Moose]

Thanks dude how does it work? Downloaded do you have to leave the app open when charging

The app is estimating effect based on the difference in reported charge level over time. It isn’t actually measuring voltage and current, which it has no way of doing. It could be accurate, but it may not be, at least not all the time.

 

[Daannnyyyyyy]

The app is estimating effect based on the difference in reported charge level over time. It isn’t actually measuring voltage and current, which it has no way of doing. It could be accurate, but it may not be, at least not all the time.

Yup I believe you are right check this out according to the app it pulls 15w via MagSafe with my PD GaN 60w anker plug and 31w at the wall via PD USB-C to lighting lol

 

[MrMister111]

apples website specifically states a 20w charger or higher is needed for fast charging the iphone 12 series https://support.apple.com/en-us/HT208137#:~:text=Fast charging works when you use an Apple,power adapter that supports USB Power Delivery (USB-PD)

Also this video explains why

So you can’t even fast charge wired a 12 now with an 18W Apple charger, and have to buy an Apple 20W?

**edit** Apple states 18W upwards allows fast charging wired

Fast charge your iPhone - Apple Support

Fast charge some iPhone models.

support.apple.com