The seven signs your old iPhone is slowing ITSELF down to save your battery – including surprising torch clue
If you've got an older Apple blower, it might be limiting itself with some surprising changes.
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4
Your iPhone might be slowing itself down – and for a very good reason
Credit: Apple
It's all part of a feature called
And yes, it might really be slowing your iPhone down – you're not going crazy.
It might sound terrible, but it's designed to help your iPhone work better for longer.
The lithium-ion battery inside your iPhone gets worse over time.
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Read more on iPhone
That's not an Apple-only problem: this common battery type will degrade as you charge it up and use it. Excessive heat can
For instance, after about two years (or 500 full charge cycles), you'd expect the battery to hold just 80% of its maximum charge when it was new. That means
And this chemical ageing can cause other problems too.
"For a phone to function properly, the electronics must be able to draw upon instantaneous
power
from the battery," Apple explains.
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Most read in Phones & Gadgets
"One attribute that affects this instantaneous power delivery is the battery's impedance.
"A battery with a high impedance may not be able to provide sufficient power to the system that needs it.
iPhone 16e review – I've secretly tested Apple's cheapest mobile and I love the new button but that's not the best bit
"A battery's impedance can increase if a battery has a higher chemical age."
When the impedance is high, the voltage can drop – and potentially fall so low that normal functioning isn't possible.
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This can play havoc with the electronics in your iPhone – and can cause the gadget to shut down entirely.
So Apple uses iPhone Performance Management to avoid these shutdowns.
4
You can check your battery's health in the Settings app
Credit: The Sun
That means having your iPhone intentionally slow down.
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"iOS will dynamically manage the maximum performance of some system components, such as the CPU and GPU," Apple said.
"As a result, the device workloads will self-balance, allowing a smoother distribution of system tasks, rather than larger, quick spikes of performance all at once.
"In some cases, you might not notice any differences in device performance."
WHY DO BATTERIES GET WORSE OVER TIME?
Here's what you need to know
Most gadgets run on lithium-ion batteries
Over time, the amount of charge this type of battery can hold gets smaller
That means you need to charge your device more often because they hold less charge
Batteries have two electrode points – the cathode and the anode
To charge a battery, the ions inside the battery are forced from the cathode to the anode
When you use a battery, it moves in the reverse direction
This process wears away at the structure of the anode, reducing its ability to function correctly
But the process also builds up a kind of salt on the cathode when charging
As this build-up grows, the battery will accept less charge over time
It's estimated that between 500 and 1,000 full charge-cycles will reduce a battery's maximum capacity by roughly 20%
Picture Credit: Apple / The Sun
When the Performance Management feature is working at "extreme" levels, you might notice certain surprising effects.
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According to Apple the seven signs to look out for are:
Longer app launch times
Lower frame rates while scrolling
Backlight dimming (which can be overridden in Control Centre)
Lower speaker volume by up to -3 dB
Gradual frame-rate reductions in some apps
During the most extreme cases, the camera flash will be disabled as visible in the camera UI
Apps refreshing in the background might require reloading upon launch
Apple also confirmed that there are several
features
that won't ever be affected by performance management.
4
If you see a battery alert, you might need to take action
Credit: Apple
So if you're experiencing issues with any of them, something else is to blame.
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Those features include:
Mobile call quality and networking throughput performance
Captured photo and video quality
GPS performance
Location accuracy
Sensors like gyroscope, accelerometer, barometer
Apple Pay
For instance, bad call quality is most likely due to you having poor signal – or because too many people are using the same network as you.
WHAT NOT TO DO!
Letting your iPhone get too hot can permanently damage your iPhone battery...
Apple says avoid these activities…
Leaving your device in a car on a hot day
Leaving your device in direct sunlight for an extended period of time
Using certain features in hot conditions or direct sunlight for an extended period of time, such as GPS tracking or navigation in a car, playing a graphics-intensive game or using augmented-reality apps
If your iPhone is getting hot, Apple says you might notice these changes...
Charging, including wireless charging, slows or stops
The display dims or goes black
Mobile radios enter a low-power state; the signal might weaken during this time
The camera flash or other camera features might be temporarily disabled
In some apps or features, performance is reduced with lower frame rates or increased processing times
Picture Credit: Apple
If you're worried about your iPhone battery, you can actually check exactly how healthy it is.
Just go into Settings > Battery > Battery
Health
and look at the read-outs on that page.
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You can see the battery's maximum charge capacity compared to when it was new, as well as how healthy it is.
It'll also flag up if your iPhone is not longer able to operate at peak performance.
4
Your iPhone battery's health will get worse over time – and you can see exactly how it's doing
Credit: The Sun
If you're having trouble here, you don't necessarily need to rush out and
snap
up a brand new iPhone.
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One cheaper option is to get a battery replacement from the Apple Store, which typically costs less than £100/$100 (unless you have a very new iPhone).
That should not only give you like-new iPhone battery capacity, but it can also improve your mobile's performance too.
And it might let you put off paying for a big iPhone upgrade for a few more years, saving you
money
.
IPHONE BATTERY SWAP – HOW MUCH WILL IT COST?
Here's how much you'll pay for iPhone battery replacements in the UK and the US..
iPhone 5 Series
iPhone 5S: £N/A / $69
iPhone SE Series
iPhone SE (1st gen) – £N/A / $69
iPhone SE (2nd gen) – £65 / $69
iPhone SE (3rd gen) – £65 / $69
iPhone 6 Series
iPhone 6 – £N/A / $69
iPhone 6s – £N/A / $69
iPhone 6s Plus – £N/A / $69
iPhone 7 Series
iPhone 7 – £65 / $69
iPhone 7 Plus – £65 / $69
iPhone 8 Series
iPhone 8 – £65 / $69
iPhone 8 Plus – £65 / $69
iPhone X Series
iPhone X – £N/A / $89
iPhone XR/XS Series
iPhone XR – £85 / $89
iPhone XS – £85 / $89
iPhone XS Max – £85 / $89
iPhone 11 Series
iPhone 11 – £85 / $89
iPhone 11 Pro – £85 / $89
iPhone 11 Pro Max – £85 / $89
iPhone 12 Series
iPhone 12 mini – £85 / $89
iPhone 12 – £85 / $89
iPhone 12 Pro – £85 / $89
iPhone 12 Pro Max – £85 / $89
iPhone 13 Series
iPhone 13 mini – £85 / $89
iPhone 13 – £85 / $89
iPhone 13 Pro – £85 / $89
iPhone 13 Pro Max – £85 / $89
iPhone 14 Series
iPhone 14 – £95 / $99
iPhone 14 Plus – £95 / $99
iPhone 14 Pro – £95 / $99
iPhone 14 Pro Max – £95 / $99
iPhone 15 Series
iPhone 15 – £95 / $99
iPhone 15 Plus – £95 / $99
iPhone 15 Pro – £95 / $99
iPhone 15 Pro Max – £95 / $99
iPhone 16 Series
iPhone 16 – £95 / $99
iPhone 16 Plus – £95 / $99
iPhone 16 Pro – £109 / $119
iPhone 16 Pro Max – £109
/
$119
Picture Credit: Apple
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