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A lot of the legends around Tesla are completely made up. We're really to believe that he created a way to make free and abundant power that could be sent remotely anywhere around the world, but the government took those plans and hid them away? That would give the government the power to be completely energy independent, which would make them an unrivaled superpower but we're to believe they have that information and haven't bothered to do a thing with it for nearly 75 years? Come on. It's like claiming my grandpa invented world peace but buried the secret with him.

Come on now... when did I say anything about sending power anywhere in the world...? No... they said he did demonstrations... i think one was where he placed light bulbs across a football field and they were not connected with wires... and he powerwd them. I don't know... i got a bad memory. but please don't jump to the most far reached crazy rumors and assume that's what I meant. he did accomplish a lot... who knows...
 
I would be interested in data regarding the temperature of the iPhone while charing with those different types of charging devices. I can imagine that e.g the 18W charger will heat up the phone - respectively the battery - more compared with the 5W charger. This will ultimately result in a shortening of the battery life. Am I correct?

That's correct. Wireless charging also results in more heat than wired. With time this will impact the battery health resulting in less battery capacity. As capacity shrinks, you have to charge more often, which means more impact on battery health. Quicker and quicker your battery dies and each new charge hurts it a bit more. This isn't going to happen overnight but after a year or two, it will take its toll on your battery.
 
A lot of the legends around Tesla are completely made up. We're really to believe that he created a way to make free and abundant power that could be sent remotely anywhere around the world, but the government took those plans and hid them away? That would give the government the power to be completely energy independent, which would make them an unrivaled superpower but we're to believe they have that information and haven't bothered to do a thing with it for nearly 75 years? Come on. It's like claiming my grandpa invented world peace but buried the secret with him.

he actually did, but he lit up a few light bulbs, nothing to do with charging and yes people know how to do it.
 
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I would be interested in data regarding the temperature of the iPhone while charing with those different types of charging devices. I can imagine that e.g the 18W charger will heat up the phone - respectively the battery - more compared with the 5W charger. This will ultimately result in a shortening of the battery life. Am I correct?

I didn't officially test this so I don't have any concrete data for you, but I can tell you that my iPhone got warmer with wireless charging than with any other method. I didn't really notice much of a heat difference between the other charging methods, but I wasn't looking for it.
 
I didn't officially test this so I don't have any concrete data for you, but I can tell you that my iPhone got warmer with wireless charging than with any other method. I didn't really notice much of a heat difference between the other charging methods, but I wasn't looking for it.
That's normal with wireless charging.
 
What is the battery life you are seeing on your iPhone when using the iPad charger? I heard that charging my iPhone with the 12W iPad charger was not recommended. I have an iPhone 6.
For the older models, I'm not sure. For my X, it's too early to tell. I did assume that charging via the MBP charger was for emergencies only, not for everyday.
 
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Depends on the style you like. The Mophie charger is smaller, Belkin is larger. Performance is going to be the same.
just looked at pictures and wow, the mophie seems substantially smaller.
apparently fast charging (7.5w) is exclusive to the mophie and the belkin at this point so I guess that's why it's so much more expensive than the $25 samsung fast charger.

Will get the mophie. Would have liked it in white, but I have limited night stand desk space.

thanks
 
Does anyone know the impact on the iPhone's battery when charging with a fast charger vs slow charger? Does a fast battery over time reduce the overall lifetime of the battery? Anyone have any specs on this? Very curious...
 
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I saw a documentary once about Tesla... and that he was able to power devices wirelessly at a far greater distance than anyone can currently... but no one knows how he did it. But I'm skeptical of even documentaries these days...

As I understand it, Tesla had a vision of FREE wireless electricity delivery (no wires!!! But also no meters). Those who like money saw opportunity for selling electricity instead of giving it away. Thus, innovation blocked, plans vanish, etc.
 
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have been using the 10w brick since my iPhone 5 (also used it for my iPhone 6) and it charged it noticeably faster then the 5w brick. since the iPhone X I used the 12w charger (still charged somewhat the same as the 10w) and really enjoy the faster charge times.

as a travel charger and/or anyone who wants to benefit from charging faster than the 5w brick. the cheaper alternative from getting the iPad brick is this one from Anker. i use it for my iPhone and apple watch while traveling and charges both exceptionally fast.

https://www.amazon.com/Anker-Charger-PowerPort-PowerIQ-Foldable/dp/B071YMZ4LD
 
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Hey jclo,

to get a final answer to the question if third party chargers are able to 7.5-watt-charge the iPhone, why don’t you compare apples certified Mophie and Belkin chargers with a few third parts options with iOS 11.2 of course?

That would be great!
 
I use the lightning cable to USB A - comes with phone and plug into my 2012 MBP and it seems very fast - much faster than plugging into wall with cube. Also plugging into USB port on car (along with Car Play) seems very fast. Great article but wish they had included those method also

These would be close to other methods that were tested. From my reading, and measurements, USB-A - Lightning is limited to a max of 2A charging current (10W). From what I have read, all MacBook USB-A ports will put out 1.1A to charge an Apple device, which would be 5.5W. The USB port in your car is going to be dependent on whatever they decided to use, but would only be able to charge your device up to 10W (2A), regardless, when using the USB-A - Lightning cable.
 
It blows my mind that Apple produces a $1,200 phone and they give you an incredibly slow charger.

Think about the money buddy (it's always about the money)... and then chime in when we post stuff like "...but who makes the most profitable _______" in countless threads. One way to become "the first trillion dollar company" is to increase average revenue per customer. Apple has learned that there is great profit in accessories and proprietary (port) licensing deals.

While some of us will grumble about stuff like this... maybe even feel aggravated enough to write such a grumble down in an online forum- does it make us actually take a meaningful action that presses Apple to change this kind of decision-making? No. We buy anyway. Apple dropped a very useful and thoroughly ubiquitous headphone jack and we griped and wrote our gripes down, etc. But when it came time to speak loudly (with our wallets), we bought anyway. Apple was rewarded for the decision, "we" gushed about the overall greatness of that iPhone, etc. Then, we lined up to compete to pay up for Apple's bluetooth buds, further rewarding Apple for that decision. And "we" gushed about the overall greatness of the buds.

Apple is able to gamble a little goodwill away in these kinds of decisions because "we" will buy anyway. They are rewarded in "record revenues & profits." "We" just accept such decisions and throw the money at them. This week there was Mac mini thread that showed a picture of the back of a Mini and all its ports. Someone posted almost incredulously "look at all those ports." Yes everyone, we used to be able to buy Apple stuff that had useful ports now available in accessory dongles (sold separately) baked right into the product itself. BUT, like the headphone jack, innovation by subtraction of consumer utility "baked in" WORKS for Apple now. "We" may grumble. "We" may write down some of those grumbles. But then we pay up anyway. Apple is rewarded by our acceptance- reluctant or not.

So why not put in an inferior charger? "We'll" wake up at 3AM to try to buy as soon as we possibly can, pumping up demand well beyond supply, then grumble (but wait) the 3, then 4, then 5 weeks for the product to come. Then, we'll accessorize it with additional items that are generally very profitable. Between a proprietary port (licensing) and a line of supporting accessories (sold separately), Apple can make a nice amount of extra profit on many iPhones sold.

At some point, a decision will be the straw and the base will rebel (with their wallets)... but while Apple can get away with it, they'll keep doing it. Shareholders are happy with maximum profits. Management is happy with more bonus money. Customers "buy them as fast as we can make them" in spite of such decisions, so they appear to be happy too. Some of those customers will hang in forums and shout down others who dare to speak negatively about such decisions... even if such opinions don't affect them at all. Given all of this: if you are Apple, don't you opt to put in the less-than-your-best charger too?
 
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Not true, you've got outdated views about fast charging. Modern technologies, like OnePlus Dash Charge, works by delivering a higher amperage which doesn't create heat.

Oh you mean that one single phone company that no one has heard of? We are talking about ALL fast charging devices that are on the market right now. The most common are battery burners.
 
Oh you mean that one single phone company that no one has heard of? We are talking about ALL fast charging devices that are on the market right now. The most common are battery burners.
I gave an example. Apple could've used the same technology, that was all I wanted to bring into the discussion.
 
Good speed comparisons but speed of charge isn't the only thing to be concerned with. I'm way more worried about the longevity of my battery. Faster charging decreases the lifespan of it.

This is a lithium ion battery with a capacity of 2.7Ah and a nominal voltage of 3.8V. Thus, it will be charged with 4.2V, regardless of the source. Since we all know watts = volts * amps, the variable between charging sources is amps. So, a 5W charging source will be providing 5W/4.2V = 1.19A during charging. This equates to a C rating of 1.19/2.7 = 0.44. This is widely understood as completely healthy for a phone battery long term.

The C rating is the key here. It is defined by (amps)/(capacity in Ah). We use it to quantify how much current the battery can safely produce (during use) or accept (during charging). Some batteries are built with a high C rating, some with a low C rating. For example, batteries used in power tools have a high C rating because we need a ton of power from them. Conversely, batteries in personal electronic devices such as phones do not require a high C rating because the power demands just aren't there.

For phones, the batteries are C rated at about 1.0. Thus, this means you should not charge your iPhone X with any more current than 1.0*2.7 = 2.7A. But we need to convert this to watts because that's how the chargers are listed: 2.7*4.2 = 11.3W. So I would say the 12W charging option is the fastest one to not adversely affect the lifespan of the battery. The higher wattage options will surely charge faster but you pay a price for that speed.
 
It takes a lot of courage to ship with the slowest charging option and block existing 3rd party wireless chargers from fast charging.
 
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Does anyone know the impact on the iPhone's battery when charging with a fast charger vs slow charger? Does a fast battery over time reduce the overall lifetime of the battery? Anyone have any specs on this? Very curious...

I've done life cycle testing on batteries from hybrid semi trucks to toy cars. Using quality cells, anything that takes an hour or more to fully charge the phone from 0% has a negligible affect on total life. On recent cells I've tested, fully charging a depleted cell in 30 minutes barely has an affect on total life cycles. (Life cycle typically equals the number of full discharge to charged cycles until the battery no longer holds 80% of its original capacity)

Heat matters, but the heat doesn't come from the battery pack charging at these rates. It comes from the electronics controlling the charging. I wouldn't be worried at all about any life cycle difference for anything up to 12 watts. I don't have any data on the exact chemistry Apple uses, but I'm guessing the hard set 18 watt limit no matter what charger you use has been tested to produce no ill affects on the battery.
 
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A 7.5W charger is 50% more powerful than a 5W charger and yet, only provides 21% more power according to the graph. If we use those differences, then a 12W wireless would produce only 76% of a charge in 60 minutes, compared to 72% by a wired charger. As you can see, there's greater loss from wireless and that loss increases as power goes up and heat loss increases.

Additionally, wireless charging creates far more heat than traditional wired charging. Heat is the biggest enemy of battery health and leads to lower overall capacity and faster drain times. So using wireless charging negatively impacts your battery life with time and causes you to need to charge more, which then leads to even less battery life in a cycle until you need to replace the battery.

Wired charging doesn't suffer these same losses wireless does as wattage increases.

now do the same math with the wired connections. you will realize that there are diminishing returns with all of them.
12W should be MORE than double the speed. but it isn't even twice as fast.
 
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