Don’t mean to start a debate, but we’re debating basic physics. 7.5 W is ~ 3x less power than 20 W, no? How can it produce more heat?02nz wrote: ↑Tue Jan 24, 2023 12:06 pmNot true at least for the iPhone, which doesn't offer the crazy fast wired charging speeds of some Android phones. Wireless charging is much less efficient and therefore produces quite a bit of excess heat. Even the slow 7.5W Anker Qi chargers I've tried with my iPhone produced significantly more heat than 20W wired charging.idc wrote: ↑Tue Jan 24, 2023 11:17 amFaster charging will produce a lot more heat in the battery than wireless charging02nz wrote: ↑Tue Jan 24, 2023 9:00 amI've never had an iPhone charging connector fail. I don't charge my iPhone wirelessly because it's quite a bit slower and produces more heat - the latter will definitely cause the battery to wear more quickly.sureshoe wrote: ↑Tue Jan 24, 2023 8:54 amGot one for Christmas as well as a phone holder for car. Really like it.idc wrote: ↑Mon Jan 23, 2023 10:28 pm Consider a magsafe generic wireless charger.
One of the reliability problems you will inevitably face with wired charging is damage to the physical connector. Nothing to do with the electronics, the frequent plugging and unplugging might eventually mechanically wear out the connector. Wireless charging is not only inexpensive, but also very convenient. Most everybody uses the same electronics, just buy one on Amazon that has good reviews and is <$20.
And as noted here, the plugging/unplugging is what damages cables. There is always just a tiny little electric hop that damages the connectors over time. Better cables last longer, but physics eventually kicks in. I like the wireless so far.
I used to work on power management for operating systems. Wireless charging is a little less efficient than wired, but the heat is not produced in the battery and charging slower gives heat more time to dissipate, so peak heat is far less. Wired charging is fast and dissipates the heat straight in the battery. In fact, charging is one of the most power hungry components of a phone. You won’t be able to sense that though as it is deep in the guts behind heat sinks, but it is what is damaging components.
But modern phones are so efficient these days it is not going to make a material difference to battery longevity anyway.