It's fine to use higher watt chargers. The phone will limit the input current. Any USB-C PD charger will work. iPhone uses up to about 22 watts and ramps down as the charge charge level increases and the battery warms up. I use 60Watt and 100Watt chargers. With a cable with power meter you can even watch the charge rate. Answer from Whiplash104 on reddit.com
Apple Community
discussions.apple.com › thread › 255200661
Standard charger wattage for iPhone 15 - Apple Community
October 13, 2023 - 1771 1 ... Standard/recommended is an Apple 20W charger, or a 3rd party charger supporting USB PD (USB Power Delivery), bearing in mind that the charger doesn’t “push” power; it just supplies the power “drawn” by the device. Take a look at this support article too:--> Fast charge ...
Reddit
reddit.com › r/iphone15 › what wattage can the iphone 15 charge at?
r/iphone15 on Reddit: What wattage can the iPhone 15 charge at?
July 2, 2024 -
Sorry if this is a dumb post but like is it alright to charge higher than 20W. I say this cause the Apple brick is 20W. I would plan to use my previous OnePlus Warp Charger (30W) to fast charge my iPhone sometimes. Is it gonna have an effect on it cause sometimes I hear that it is gonna overheat or damage the battery or whatever but like is it really that bad? I mean my iPhone 15 already sometimes apparently overheats cause it says that “Charging was on hold due to iPhone temperature” but when I do feel it, it doesn’t even feel that hot
Top answer 1 of 3
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It's fine to use higher watt chargers. The phone will limit the input current. Any USB-C PD charger will work. iPhone uses up to about 22 watts and ramps down as the charge charge level increases and the battery warms up. I use 60Watt and 100Watt chargers. With a cable with power meter you can even watch the charge rate.
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First, those are not chargers. They are power adapters. Think of them as power supplies. So then what do they supply power to? The charger, which is inside of the iPhone. Yep: the charger is inside of the iPhone, and it's been this way since the beginning as far as I know. So the iPad is designed the same way. I know the iPad was the first to bring those bigger 12W power adapters, but that's all they are: power adapters, not chargers. Now that I've cleared this up, I can speak plainly: power adapters don't push power into the charger (they don't push power into the iPhone). The charger draws power from the power adapter, and it can only draw as much as it's designed to, and it dynamically fluctuates until the battery reaches 80%. From there, it goes into a cool-down charging power (I think it's 5W) until it reaches 100%. The power adapter just sits there allowing the charger (the iPhone) to draw whatever it can out of it. That's why it's safe to use power adapters that are 30W and higher.
Iphone 15 Pro Charger 20w necessary? | MacRumors Forums
I upgraded to the Iphone 15 pro. Can I use my 18w charger that came with my Iphone 11 Pro or do I have to buy a 20w charger? I don't want to damage my new phone if the 18w will damage it in any way? ... You can use your existing charger. ... Try to use your existing charger first to see if it works well enough. If it does not work, get the 20 watts ... More on forums.macrumors.com
I just got a wireless charger for Christmas but it’s only 15 watts
Jokes aside 😂 It will be perfectly fine for your phone, phones and batteries have become alot more better in recent years. The phone will draw as much wattage as the charger will allow, it won’t draw anymore or any less. Only thing to having a 15 watt compared to say a 25 watt is the charge speed will be slower. I use a 15 watt charger for my 16 pro and it works perfectly fine and hasn’t caused any issues whatsoever. Hell I have a 7.5watt charger that works with my 16 pro buts slow af. Probably will get a new one soon. More on reddit.com
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December 26, 2024What wattage can the iPhone 15 charge at?
It's fine to use higher watt chargers. The phone will limit the input current. Any USB-C PD charger will work. iPhone uses up to about 22 watts and ramps down as the charge charge level increases and the battery warms up. I use 60Watt and 100Watt chargers. With a cable with power meter you can even watch the charge rate. More on google.com
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July 2, 2024Which charger are y’all using for your iPhone 15?
I’ve just been using apple’s “slow” 5W charger that I’ve had since my XR with a USBC to A adaptor in it to use the cable my 15 Plus came with. I also have Apple’s 20W “fast” charger but I prefer to use the slow one as I leave my phone plugged in overnight so it has more than enough time to charge slowly and is easier on the battery in the long run. More on reddit.com
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December 8, 2023Videos
Apple Support
support.apple.com › en-us › 102574
Fast charge your iPhone - Apple Support
For iPhone 15 and earlier, you can fast charge up to 15W with a MagSafe Charger and one of these adapters: ... Fast charging might not work in conditions that are too cold or too hot. If you're not sure which Apple Power Adapter you have, check the wattage on the top or bottom of the adapter:
Anker
anker.com › home › blog center › chargers › what charger does the iphone 15 use? everything you need to know
What Charger Does the iPhone 15 Use: Explained - Anker US
September 30, 2025 - The iPhone 15 and iPhone 15 Plus support USB-PD fast charging at up to 20 watts. With a compatible 20W USB-C charger, you can achieve a 50% charge in approximately 30 minutes.
Chargerlab
chargerlab.com › charging-review-of-apple-iphone-15-pro
Charging Review of Apple iPhone 15 Pro - Chargerlab
October 26, 2023 - In summary, the iPhone 15 Pro has reduced its full charging time by a few mins compared to the previous generation, and its compatibility remains excellent as always. But its maximum charging power has decreased by a few watts. However, the new USB-C port makes charging and data transfer more convenient. It also enhances the compatibility of third-party chargers...
Amazon
amazon.com › iPhone-Charger-Charging-Apple-MacBook › dp › B0C69HB8PM
Amazon.com: iPhone 17 16 15 Charger Fast Charging,2Pack 20W Apple iPad USB C Wall Chrager Block with 6FT USB C to C Cable for iPhone 17/Pro/Pro Max/17 Air/ 16/16 Pro/16 Pro Max/15/Plus/Pro/Pro Max (White) : Cell Phones & Accessories
【Fast charge iPhone 17/16/15】20W iPhone usb c charge block and charging cable are both equipped with smart chips, which can quickly charge New iphone, full charge your iPhone 15 Pro Max from 0% to 30% in just 30 mins, 3X Faster than the ...
MacRumors
forums.macrumors.com › iphone, ipad, and ipod touch › iphone › iphone
Iphone 15 Pro Charger 20w necessary? | MacRumors Forums
October 1, 2023 - I used any one I can to hookup to my iPhone 15 Pro including the 30 watt charger, the 20 watt charger and even to the iMac. My phone does not care as long as it is usb c connection it is fine.
PTC Phone Tech & Comm
ptc.net.au › blog › 30w-vs-20w-charging-speed-comparison-and-purchase-guide
30W vs 20W - Charging Speed Comparison and Purchase Guide
September 17, 2024 - The results indicated that the 30W charger provided a charging wattage of approximately 25W, whereas the 20W charger lagged at a maximum output of 18.54W, showcasing a noticeable 6W disparity.
Amazon
amazon.com › AmazonBasics-15W-Certified-Wireless-Charging › dp › B0872RLX6Z
Amazon.com: Amazon Basics 15W Qi Certified Wireless Charging Pad for iPhone 16/15/14/13/12/11/X, Samsung and More, with USB Cable, Black : Cell Phones & Accessories
Amazon.com: Amazon Basics 15W Qi Certified Wireless Charging Pad for iPhone 16/15/14/13/12/11/X, Samsung and More, with USB Cable, Black : Cell Phones & Accessories
Reddit
reddit.com › r/iphone16pro › i just got a wireless charger for christmas but it’s only 15 watts
r/iPhone16Pro on Reddit: I just got a wireless charger for Christmas but it’s only 15 watts
December 26, 2024 -
I was just wondering if I use this 15 watt wireless charger will it damage my iPhone 16 pro or will it destroy the charging capacity cause it’s so low wattage
Top answer 1 of 5
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Jokes aside 😂 It will be perfectly fine for your phone, phones and batteries have become alot more better in recent years. The phone will draw as much wattage as the charger will allow, it won’t draw anymore or any less. Only thing to having a 15 watt compared to say a 25 watt is the charge speed will be slower. I use a 15 watt charger for my 16 pro and it works perfectly fine and hasn’t caused any issues whatsoever. Hell I have a 7.5watt charger that works with my 16 pro buts slow af. Probably will get a new one soon.
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I charged my 15 Pro Max and now my 16 Pro overnights with a regular USB-C connection, intentionally not doing fast charge. There is no heat at all with the phone and it’s been just great. I believe it’s somewhere around 7.5 watt.
Walmart
walmart.com › cell phones
15 Watt Wireless Charger
ChargeWorx 3-in-1 Wireless Charger, Foldable Magnetic Charging Station with 15-Watt Fast Charging, Compatible with iPhone, Samsung, and Other Phones, Smartwatches, and Headphones, White
Nedis
nedis.com › en-us › which-charger-do-i-need-iphone-15
Wich charger do i need for an iPhone 15? - Nedis
Achieving the specified charging time is contingent on using the appropriate wattage charger. The iPhone 15 supports charging at 20 watts, making it the minimum wattage requirement for achieving the fastest charging speed. However, there's no harm in using a charger with a higher wattage.
Android Authority
androidauthority.com › home › mobile › iphone 15 series battery life and charging speeds: how long does it last?
iPhone 15 series battery life and charging speeds: How long does it last?
March 19, 2025 - Put simply then, the iPhone 15 supports 15W MagSafe charging and just 7.5W of power via the first-gen Qi protocol. It’s possible that the iPhone will charge at 15W via future Qi2 chargers, but only time will tell.
Google
google.com › goto
Fast charge your iPhone
September 19, 2025 - For iPhone 15 and earlier, you can fast charge up to 15W with a MagSafe Charger and one of these adapters: ... Fast charging might not work in conditions that are too cold or too hot. If you're not sure which Apple Power Adapter you have, check the wattage on the top or bottom of the adapter:
Amazon
amazon.com › Fast-Charger-USB-Wall-Charegr › dp › B09KR8P3L5
Amazon.com: iPhone 17 16 15 Charger Fast Charging Type C Chargers USB C Charger Block iPhone 17 16 15 Air Pro Max Chargers with 6FT Cable for iPhone 17/17 Plus/17 Pro Max/16/16 Plus/16 Pro Max/15 Pro Max/iPad Pro : Cell Phones & Accessories
Built-in advanced USB Power Delivery 3.0 chip, and loaded with 20W of output power to give your iphone 17 /iphone 16/iphone15/iPad pro 2020/2018 12.9/11 a full-speed charge.The Power Delivery Wall Charger for iPhone owns a built-in multi-protection ...
JustAnswer
justanswer.com › smartphones › ry9ib-so-different-fast-wireless-chargers.html
Will a 15W Charger for iPhone 15 Fit iPhone 16 Max?
May 10, 2025 - A 15W fast wireless charger designed for iPhone 15 generally supports iPhone 16 models, including Max versions, due to Qi standard compatibility. However, charging speed can vary based on charger quality and device alignment.
Belkin
belkin.com › shop by › choose your device › iphone 15
iPhone 15 USB-C & wireless chargers, power banks, screen protectors. | Belkin US
iPhone 15 must-haves: 3-in-1 and 2-in-1 MagSafe wireless chargers, magnetic power banks, USB-C chargers and cables, screen protectors & more.
Quora
quora.com › Has-charging-my-iPhone-15-Pro-Max-with-my-USB-C-laptop-charger-being-damaging-to-the-battery-I-m-at-91-capacity-after-275-charging-cycles
Has charging my iPhone 15 Pro Max with my USB-C laptop charger being damaging to the battery? I’m at 91% capacity after 275 charging cycles. - Quora
Answer (1 of 8): Thanks for the A2A. No, charging your iPhone 15 Pro Max with your USB-C laptop charger is not damaging the battery. It doesn’t matter what power adapter you use, or what its charging output is. iPhones (and all other smart phones and tablets for that matter) only take the power ...