MagSafe 15W bricks

[Brien]

Has anyone found any third party adapter that will charge via MagSafe at full 15 watt speed? It appears many do not.

 

[Jimpilot]

I’ve been looking but so far nothing I would trust to pit on my phone

 

[blairh]

Has anyone found any third party adapter that will charge via MagSafe at full 15 watt speed? It appears many do not.

Just a heads up, it doesn't consistenly charge at 15w. I had no idea until a fellow forum member pointed me to a link, and a further deep dive into the manner online backed this up. I wouldn't put too much value into MagSafe speeds.

 

[russell_314]

Apple adjusts the charging speed based on many factors. This is to improve battery life. Even when my 12 Pro Max is plugged directly into a 20 watt charger it doesn't charge at 20 watts

 

[George Knighton]

I have a single MagSafe charger attached to an Apple USB-C brick and I can usually see only 6.33 W.

But who knows. Maybe it is the app (Ampere) that is wrong.

It is certainly better than my older wireless chargers but not better enough to buy any more of them.

 

[Synomenon]

According to Apple:

How to use your MagSafe Charger with iPhone - Apple Support

iPhone 16, iPhone 15, iPhone 14, iPhone 13, or iPhone 12 models can charge with MagSafe Charger.

support.apple.com

The MagSafe Charger is designed to negotiate the max power up to 9 volt (V) and 3 amp (A) with a USB PD-compatible power adapter. MagSafe will dynamically optimize power delivered to the iPhone. The power delivered to the iPhone 12 at any moment will vary depending on various factors, including temperature and system activity.

Also the 15W charging happens before your battery gets to around 80% I believe. Once it gets above that, the charge rate slows. So as long as the charger can provided 9V + greater than 2.22A it should work.

 

[1rottenapple]

I know people obsess about 15w. 15w only is at full speed early on and then when the MagSafe heats up and the phone reaches 40-50% it’s lowers significantly.

 

[1rottenapple]

I have a single MagSafe charger attached to an Apple USB-C brick and I can usually see only 6.33 W.

But who knows. Maybe it is the app (Ampere) that is wrong.

It is certainly better than my older wireless chargers but not better enough to buy any more of them.

Same here. As the phone heat up MagSafe pulls watts.

 

[George Knighton]

I see. Well, I'll run down the device today and try it out when it's low, see what happens.

Thanks very much for your help.