13 ms·

Wireless charging kills batteries faster -- that's why I personally avoid it.

by ablyveiled 3y ago

itsyaboi 3y ago
How so?
- rubatuga 3y ago
  Mostly the extra heat degrades the battery chemistry
  - itsyaboi 3y ago
    Perhaps this is an issue with a particular charger? I've yet to notice my phone get warm when charging wirelessly.
    - stevenhuang 3y ago
      The best wireless chargers I'm aware of are the magsafe ones which align the coils using magnets, improving efficiency and reducing heat.
pazimzadeh 3y ago
Can you expand on this because I've noticed that my iPhone 13 mini's battery life has been quickly getting worse, and I use the magsafe charging a lot.
- radicaldreamer 3y ago
  It's the heat generated with wireless charging which kills the battery, not the charging speed
- Gigachad 3y ago
  Open the battery page in the settings and look at what % it has left. At 80% Apple suggests replacing it.
bryanlarsen 3y ago
Wireless is usually a lot slower than plugging it in, so i suspect it'd be better on batteries rather than worse. But the best way to save your batteries is to not charge to 100%.
- LeifCarrotson 3y ago
  I wish there were standard software in Android and iOS to limit charge percentage and battery temperature during charging. It's ludicrous to me that the default behavior is plugging in your phone to a 30W ludicrously fast charger when you go to bed in the evening, where it then climbs to 100% charge and holds there while you sleep. I should be able to tell it I'd like it to reach 85% charge as of the time my alarm goes off in the morning, timing that in a way that minimizes battery heating. My laptop, likewise, should be able to sit at 85% when on the docking station, potentially even syncing with my calendar to know when I have to leave and might need more battery or a more rapid charge before a meeting.
  - TexanFeller 3y ago
    > It's ludicrous to me that the default behavior is plugging in your phone to a 30W ludicrously fast charger when you go to bed in the evening, where it then climbs to 100% charge and holds there while you sleep. Apple already does something similar. It's not configurable beyond on/off but optimized battery charging on MBP, iPhone, and iWatch learns when you're normally awake and holds charging at ~80% overnight until a bit before your normal wakeup time. On MBP it holds at 80% most of the time during the day too if it learns you're rarely running on battery.
    - deprecative 3y ago
      On Android this is called Adaptive Charging and has been on my Pixels for several years at this point.
  - richev 3y ago
    > ludicrously fast charger when you go to bed in the evening This is why I never charge overnight. Just pop the phone on to charge while I'm having a shower in the morning, or in the evening while I'm having dinner. Those time windows seem enough to keep my phone (Pixel 5) sufficiently charged. > My laptop, likewise, should be able to sit at 85% when on the docking station Samsung laptops have/had this exact feature, which they called Battery Life Plus[1] [1] https://web.archive.org/web/20140101070825/https://www.samsung.com/us/article/tips--tricks-extending-notebook-battery-life/ https://web.archive.org/web/20140101070825/https://www.samsu...
RandomThrow321 3y ago
Do you have a source? I thought this has been thoroughly debunked.
- stevenhuang 3y ago
  > thoroughly debunked. I wish people would stop using this phrase. Especially when they couldn't be more wrong. Heat degrades batteries, wireless charging generally comes with more heat from the lower efficiency. But at the end of the day it most likely won't matter as people get new phones every few years anyways.
  - shawabawa3 3y ago
    There are so many more factors than heat though For one, I thought charging slower was better, so could the increased heat be offset by that? Also, it's more heat per joule transferred, but over a longer period of time, is that not better than sudden heat from fast charging?
    - stevenhuang 3y ago
      Heat is the primary factor, and even with fast charging the inefficiencies of wireless charging will mean the latter will dump more heat into your phone. The constant current phase of fast charging does not generate much heat in comparison at given wattage as it's able to charge up your phone much more quickly at higher efficiency until it switches to trickle charging at ~80%.
  - illiac786 3y ago
    But fast charging makes batteries very hot too. Btw, you basically just asked people to know when they are wrong. Seems very optimistic...
    - stevenhuang 3y ago
      Where did I say fast charging doesn't make batteries hot? I've built LiPo packs from scratch and rebalanced cells manually, I know something about LiPo degradation.
hammyhavoc 3y ago
Page 1 of Google seems to suggest the contrary. Source?
atherton33 3y ago
The dock seems to be magsafe style contacts not wireless
deleted 3y ago
[deleted]
MBCook 3y ago
This isn’t wireless, it’s basically pogo pins. It’s magnetically aligned/held, but that’s all.

Wireless charging kills batteries faster -- that's why I personally avoid it.

itsyaboi 3y ago

How so?

rubatuga 3y ago
Mostly the extra heat degrades the battery chemistry
- itsyaboi 3y ago
  Perhaps this is an issue with a particular charger? I've yet to notice my phone get warm when charging wirelessly.
  - stevenhuang 3y ago
    The best wireless chargers I'm aware of are the magsafe ones which align the coils using magnets, improving efficiency and reducing heat.

pazimzadeh 3y ago

Can you expand on this because I've noticed that my iPhone 13 mini's battery life has been quickly getting worse, and I use the magsafe charging a lot.

radicaldreamer 3y ago
It's the heat generated with wireless charging which kills the battery, not the charging speed
Gigachad 3y ago
Open the battery page in the settings and look at what % it has left. At 80% Apple suggests replacing it.

bryanlarsen 3y ago

Wireless is usually a lot slower than plugging it in, so i suspect it'd be better on batteries rather than worse. But the best way to save your batteries is to not charge to 100%.

LeifCarrotson 3y ago
I wish there were standard software in Android and iOS to limit charge percentage and battery temperature during charging. It's ludicrous to me that the default behavior is plugging in your phone to a 30W ludicrously fast charger when you go to bed in the evening, where it then climbs to 100% charge and holds there while you sleep. I should be able to tell it I'd like it to reach 85% charge as of the time my alarm goes off in the morning, timing that in a way that minimizes battery heating. My laptop, likewise, should be able to sit at 85% when on the docking station, potentially even syncing with my calendar to know when I have to leave and might need more battery or a more rapid charge before a meeting.
- TexanFeller 3y ago
  > It's ludicrous to me that the default behavior is plugging in your phone to a 30W ludicrously fast charger when you go to bed in the evening, where it then climbs to 100% charge and holds there while you sleep. Apple already does something similar. It's not configurable beyond on/off but optimized battery charging on MBP, iPhone, and iWatch learns when you're normally awake and holds charging at ~80% overnight until a bit before your normal wakeup time. On MBP it holds at 80% most of the time during the day too if it learns you're rarely running on battery.
  - deprecative 3y ago
    On Android this is called Adaptive Charging and has been on my Pixels for several years at this point.
- richev 3y ago
  > ludicrously fast charger when you go to bed in the evening This is why I never charge overnight. Just pop the phone on to charge while I'm having a shower in the morning, or in the evening while I'm having dinner. Those time windows seem enough to keep my phone (Pixel 5) sufficiently charged. > My laptop, likewise, should be able to sit at 85% when on the docking station Samsung laptops have/had this exact feature, which they called Battery Life Plus[1] [1] https://web.archive.org/web/20140101070825/https://www.samsung.com/us/article/tips--tricks-extending-notebook-battery-life/ https://web.archive.org/web/20140101070825/https://www.samsu...

RandomThrow321 3y ago

Do you have a source? I thought this has been thoroughly debunked.

stevenhuang 3y ago
> thoroughly debunked. I wish people would stop using this phrase. Especially when they couldn't be more wrong. Heat degrades batteries, wireless charging generally comes with more heat from the lower efficiency. But at the end of the day it most likely won't matter as people get new phones every few years anyways.
- shawabawa3 3y ago
  There are so many more factors than heat though For one, I thought charging slower was better, so could the increased heat be offset by that? Also, it's more heat per joule transferred, but over a longer period of time, is that not better than sudden heat from fast charging?
  - stevenhuang 3y ago
    Heat is the primary factor, and even with fast charging the inefficiencies of wireless charging will mean the latter will dump more heat into your phone. The constant current phase of fast charging does not generate much heat in comparison at given wattage as it's able to charge up your phone much more quickly at higher efficiency until it switches to trickle charging at ~80%.
- illiac786 3y ago
  But fast charging makes batteries very hot too. Btw, you basically just asked people to know when they are wrong. Seems very optimistic...
  - stevenhuang 3y ago
    Where did I say fast charging doesn't make batteries hot? I've built LiPo packs from scratch and rebalanced cells manually, I know something about LiPo degradation.

hammyhavoc 3y ago

Page 1 of Google seems to suggest the contrary. Source?

atherton33 3y ago

The dock seems to be magsafe style contacts not wireless

deleted 3y ago

[deleted]

MBCook 3y ago

This isn’t wireless, it’s basically pogo pins. It’s magnetically aligned/held, but that’s all.