Can use iPad 12W charger to charge iPhone 6s Plus without any risks?

Firstly thanks a lot by participating in this topic. Did you check (or notice) any difference in temperature (at back side of any of your both iPhone 6 or 7) when did you charge them with the 12W?

Any kind of overheating (even if small one compared with using the 5W adapter?)

If not done yet, may I ask you the next time that you charge your iPhones to try to charge the iPhone 6 with the 5W and the 7 with the 12W and take a look to their back respective temperatures, at least the first minutes when you begin to charge them, please?

(I don't know if you have any kind of temperature sensor to measure their backs during charging state to compare how affects to the iPhone 6 the charging difference from 0-80% between the 5W adapter (1A consumption) and the 12W adapter (1.5A), please.)

In any case, thanks by your contributions Lawrence! ;-)

Thanks by your sharing 'Gail from Maine', but on iPhones older than iPhone 6 generation, there is no difference at all, as I mentioned in the first post.

BTW, the iPhone7s Plus doesn't exist; which is your iPhone Plus model: 6s Plus or 7 Plus?

Hi Lawrence,

Thanks a lot, it is a pity that you have not anymore the iPhone 6 to perform the temperature quick experiment with the 5W and 12W adapters; but if your iPhone 7 Plus is drawing 2A when the 12W adapter is used, it will be a very good candidate for this experiment.

I am fully agree with all your arguments and reasonings, really. Most probably it is more dangerous to play 3-4 hours to 3D hard intensive games (which I even don't do it) (in terms of overheating of the whole device and stress on it), that the probable small over temperature made of using the 12W iso 5W adapter.

In any case, I (and many other Apple community members) will be really thank you if you could make the experiment of using your precision laser temperature gauge next time that you have the chance to see which is the differential heat load for the 5W cube vs the 12 W adapter for your iPhone 7 Plus.

I suppose that we will need to wait you around 5 days at least before you can come back to tell us your outcomes (while you do your usual use of your 7+ and then the discharging-charging-discharging-charging cycles with both adapters).

We will wait impatiently. Thanks a lot in advance! 🙂

Thanks by your comment Philly, I really understand your concern. I simply ask it because most of the users would even not realize it about the impact of it (if it exists, which I still don't know, I will wait for Lawrence thermal tests on his 7+ device). This 'possible' impact on the battery lifespan (and consequently on its battery lifetime (number of recharging cycles is limited)); if there is any,... it will be only noticeable after maybe some months or maybe 1-2 years after using the 12W always as main charger. Because the hypothetical 'bad' damage in the battery lifespan would be very small (tiny in each recharge) (that is why maybe Apple could be saying that they are 'compatible' but Apple doesn't spread openly their use and promote them a lot in the community, because even small, could it be a 'risk'), but after 100 times recharging your iPhone 6 or higher, those tiny damages will really reduce the lifespan of the battery.

Most users will never notice, as most probable they will change their iPhones just after 2 years, for a newer model, or end of contract or because it become slower with more iOS updated features. But for users which want to keep the iPhones at least 3-4 years, it would be a real concern. And this is not hypothetical, as the iPhone 6s has not been discontinued this year, and that model will begin to have 3 years old for some users soon.

Dear Philly, I know that the easiest way for me would be to give up and go ahead only with the 5W adapter ;-) but I really want to understand it and find answers to my previous questions. Like for instance, 'why is Apple don't promoting explicitely its use since iPhone 6 of all is 'good and shiny advantages'?' They will sell plenty of extra 12W chargers, specially to all iPhone Plus users. But for some reason, Apple is not doing it. The battery lifespan has been always an issue in all smartphones (that is why Apple introduced this year the wireless capabilities on the iPhone 8 series, to make up the problem that most users need to recharge their devices every day, and that is quite unconvenient, simply because the battery technologies are still not capable to offer longer times and Apple had not other solution to keep thinner their devices).

In any case, I dont want to create a debate, just to know with some figures if any of the iPhone Plus models get noticeable overheated when they are recharged with the 12W adapter model (or maybe not?), and if possible to measure them with a temperature meter as Lawrence kindly offered to us to check on an iPhone 7Plus; but if somebody else could do it also in a iPhone 6sPlus or iPhone 6Plus, or even in the smaller iPhone 6, will be very welcomed. Thanks in advance!

Please Lawrence, I really ask you this small last favor, please. I suppose that we should not get surprising figures, but to finish the experiment that we (you) began, it will be very useful to check that last thing :-P

Really thanks a lot in advance by your kind help Lawrence.

(And to don't bother you more times, and in case you may be to be so kind to decide to make this last experiment with the 5W adapter: may you also at same time quick check the temperature change in the 5W adapter itself? I am hearing many people about the pretty bad building quality of it (Apple's 5W adapter), that it breaks easily after few months, and even it gets considerably hot; this last thing is also mentioned in its Apple's manual, although Apple officially states there that it is still in the safety surface temperature limits of IEC 60950-1).

By the way, the last third question: did you notice if in the Apple's 12W adapter (or any other higher power USB charger) also gets noticeable and very warm? (I will not bother you in this case to take temperature measurements of the 12W or 40W adapters, but thanks by your kind feedbacks :-P)

Really thank you, Lawrence!

Of course! It was a lot, really!

I will keep the post open to see if other users with the iPhone 6 Plus or iPhone 6s Plus could make similar measurements (power consumption and temperature variation between the Apple's 5W and 12W adapters) to have a full picture, because until today I didn't see any of your figures anywhere!

Thanks again Lawrence (and any other will be able to further contribute)! 🙂

Thanks Michael, but that information is incomplete, as doesn't clear explain if using Apple 12W (or higher) adapters will charge faster than using the 5W power adapter (or not?), in other still sold models as: iPhone6s, iPhone6s Plus, iPhone7 & iPhone7 Plus.

Thanks by the sharing, I already saw it; there is no clear reference nor facts there with respect the iPhone 6(s)Plus.

Philly, may I kindly ask you on which iPhone model (or models) have you being charging them with the 12W adapter for years without issues, please? :-)