Recent comments in /f/iphone

thursdayfern t1_j627tet wrote

I had a feeling someone would bring up Ohm’s law, and that’s why I said “in practice” and not “in theory”, because you are correct, in theory a shorter cable means less resistance means faster charging.

In practice, a 1m usb cable has less than 1 ohm resistance; I would imagine the difference in charge time between a 1cm cable and a 2m cable would be measured in seconds.

Also yeah, MagSafe is relatively inefficient for charging, but it is one of the most efficient methods of wireless charging, if not the most efficient (because alignment magnets).

A longer cable wouldn’t change much at all in this equation. You can test this yourself with a usb c extension cable (assuming it supports the necessary PD standards).

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dislikebuttonz t1_j627fee wrote

obviously not everyone is the same, but in my case my grandpa (72yrs old) got a XS Max a few months ago as he upgraded from a 7+. i thought he would have trouble using it but nope he didn’t need help figuring out the gestures after i showed him ONCE. Just ONCE but after that he learned himself pretty quickly how to navigate the phone which surprised tf out of me as he doesn’t know jack about modern tech

i would personally teach her how to use the phone incase she struggles but if you do it shouldn’t be too bad. with that being said definitely opt for the 12 pro but make sure the battery has decent health

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tsdguy t1_j627573 wrote

Why would you ever turn off Bluetooth? It takes no data and is used extensively for Apple device services including personal hotspot detection and management.

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cooguy1 t1_j626hls wrote

Use ProRAW I stopped letting my 13 process the photos because the processing just wasn’t that good when I first got it last year. I prefer the more realistic unprocessed look that ProRAW gives plus if I wanted I can edit it on my phone/iPad/PC if I feel like touching up something later.

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SnooKiwis6943 t1_j6267x9 wrote

Actually, in theory yes it does work. Current is equal to voltage divided by resistance (I=V/R). The higher the current, the faster the charge. The longer the charging cable, the more resistance that cable has and the lower the current is, resulting in a slower charge. Fun fact the wireless charging (mag safe) that Apple makes for the iPhone only comes with a built in cable that is of relatively short length and only available in that short length for this very reason. The mag safe uses induction charging which is very inefficient and requires a lot more amps to charge your phone. If the MagSafe charger had a longer wire, you would need more than the 20 watt charging block to power the charger due to the resistance in the longer wire.

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