On the left pane, under General, select Battery Information. Verify the battery health information as illustrated (Figure 1). Figure 1: Screenshot of battery health status in the BIOS. Power on the computer and tap F2 key at the Dell logo screen. Select the Advanced tab. Verify the battery health information as illustrated (Figure 2). Battery Health - Monitor Stats 5.8 MAS + InApp macOS 6 mb. Battery Health 2 provides detailed stats and health information for your MacBook's battery! Used by millions of Mac users worldwide, it is considered by many as one of the essential free utility apps for your Mac. With Battery Health 2, you can easily see all the important. How to maximize battery health Like all batteries, lithium-ion cells are consumables that age and deteriorate over time and with usage. The best way to extend battery life and performance is to drain the battery below 50 percent several times a week before recharging rather than discharging it on frequent short and shallow discharge cycles. What's new in this version. What's new in the latest release? -Bug fixes -Even more beautiful graphs v1.0.25.134 -Bug fixes to battery depletion% -Bug fixes to the app shortcuts -Made necessary changes for the next big update which will be released soon v1.0.25.125 -Bug fixes on app rendering -Capability to choose low battery notifications v1.0.25.123 -Performance in app startup times v1.0.23. Battery Life - Up to 2.5 Hours Flow Rate - 5 Battery Life - Up to 2 Hours Flow Rate - 6 Battery Life - Up to 1 Hour.Battery life is dependent on breaths per minute (BPM) Charging with the AC and DC Power Supply The 8 cell battery even has the capability to charge automatically with both the AC power supply for stationary charging, or with the.
The issue I've been coming across recently seems to be mostly with Dell's XPS line of laptops, though it can certainly affect others: My new XPS 13 9370, XPS 15 9575, and XPS 15 9570 showed 8, 14.5, and 10% battery wear out-of-the-box, respectively (a battery wear of 10% means that the battery is only able to charge to about 90% of its rated capacity).
Normally, batteries will only show this much wear after a year of heavy usage, and it isn't something you should accept in a new laptop. I realized something was up when every single XPS 15 I checked out new had around 10% battery wear reported, however. Warning: lithium-ion batteries should generally not be fully discharged as this cause real wear to the battery. Thus, battery re-calibration should only be conducted sparingly when you suspect a problem with the way the battery reporting its capacity.
Battery calibration hasn't been much of a necessity since lithium-ion batteries got so much smarter over the past few years. Thus, even as someone who considers themselves to know quite a bit about notebooks, properly calibrating the battery in my new XPS laptops (showing incorrect wear percentages out of the box) was something I had to do a bit of reading up on combined with some trial and error to get right, and so I thought I would write a brief guide on how to do it right the first time. Chaos reborn 1 0.
Following this protocol, I was able to reduce the reported wear levels significantly to the low single-digits and recover a good deal of battery life.
Checking your battery's reported wear
Before bothering with a calibration, it's necessary to check the reported health of your battery. If your battery is new and showing less than 95% of its original capacity then it is probably worth recalibrating.
Go to the Start menu and search 'cmd' to show the Command Prompt (PowerShell will do fine as well). Right-click the search result to run your choice of app as an administrator. Copy and paste the following line into the command line: powercfg /batteryreport
The battery health report will be output to the Windowssystem32 folder by default.
Copy the directory path and paste it into your favourite web browser to view it. Once it opens, you can scroll down a bit and you should see your battery's health as a function of design capacity (rated capacity) and full charge capacity (actual amount the battery reports it is able to hold).
After calibration. Before calibration, the full charge capacity was only 87,000 mWh, or less than 90% of advertised.
By doing some quick math you should be able to see how healthy your battery currently is. Technically it is not good to fully charge and discharge a Li-Ion battery often (which is what calibration requires), so if your battery is not new and the wear percentage seems reasonable, it may be best to leave it. If you see only 90% of capacity on a new laptop, however, then this guide will definitely help.
The procedure
Step 1:
First, you will need to let your laptop charge to its 'full' capacity. OEMs like Dell and Lenovo allow the user to set charging-thresholds on the battery in order to preserve the battery health (this is a very good practice that I encourage all OEMs to follow). Thus, to charge the laptop fully, you'll need to find that setting and set your charging threshold temporarily to 100%. Taskpaper 3 5 1 – simple to do list. On XPS machines, this is done through Dell Power Manager or the BIOS.
You'll need to set the charging behavior to 'Standard' or change the slider manually to 100% to complete the first step. Once this is done, make sure your laptop is plugged-in and allow it to charge completely.
Step 2:
Next, you need to let the battery completely discharge until forced shut-off (not just hibernation). There are a few ways to do this, but my favourite method is the simplest: Restart the laptop in BIOS mode, then go out of the house for the day. With this method, you don't need to worry about the laptop going to sleep or hibernating as these features are not enabled when viewing the BIOS. Additionally, power-saving states are not enabled for the CPU when in the BIOS either, meaning the laptop will run down significantly faster than it would in Windows under normal usage.
You could also use the laptop normally and let it run down until it automatically hibernates, then leave it in BIOS as described above as well. This requires your turn off all of the sleep and hibernation timers in the Power Options control panel first, however.
Step 3:
WAIT. Do not immediately charge the laptop; be sure the laptop has been sitting cool and unplugged for 3-5 hours before the next step. Failing to perform this step can result in making your reported battery wear worse.
Step 4:
Plug the laptop in and let it charge to maximum uninterrupted. You should be able to use the laptop in Windows at this point, but I let it charge in BIOS out of superstition. When you generate your battery report again, you should (hopefully) see a much higher rated capacity for your new battery.
Conclusion
That's it! Using this method I was able to reduce my 9575 reporting 14% wear down to 4%, my 9570 reporting 10% down to 3.8%, and my 9370 reporting 8% wear down to 4%, and I hope it fixes the problem for you simply as well. As always, try to practice good battery care to prolong their lives: Keep them cool, don't run them dry, and don't charge them to maximum often. If you are interested in reading more about safety and care for Li-Ion batteries, you can check out this guide for further reading.
Did you also get an XPS laptop with double-digit battery wear? Please share your results in the comments.
Your iPhone is designed to deliver an experience that is simple and easy to use. This is only possible through a combination of advanced technologies and sophisticated engineering. One important technology area is battery and performance. Batteries are a complex technology, and a number of variables contribute to battery performance and related iPhone performance. All rechargeable batteries are consumables and have a limited lifespan—eventually their capacity and performance decline such that they need to be replaced. As batteries age, it can contribute to changes in iPhone performance. We created this information for those who would like to learn more.
About lithium-ion batteries
iPhone batteries use lithium-ion technology. Compared with older generations of battery technology, lithium-ion batteries charge faster, last longer, and have a higher power density for more battery life in a lighter package. Rechargeable lithium-ion technology currently provides the best technology for your device. Learn more about lithium-ion batteries.
How to maximize battery performance
'Battery life' is the amount of time a device runs before it needs to be recharged. 'Battery lifespan' is the amount of time a battery lasts until it needs to be replaced. One factor affecting battery life and lifespan is the mix of things you do with your device. No matter how you use it, there are ways to help. A battery's lifespan is related to its 'chemical age,' which is more than just the passage of time. It includes different factors, such as the number of charge cycles and how it was cared for. Follow these tips to maximize battery performance and help extend battery lifespan. For example, keep iPhone half-charged when it's stored for the long term. Also avoid charging or leaving iPhone in hot environments, including direct sun exposure, for extended periods of time.
When batteries chemically age
All rechargeable batteries are consumable components that become less effective as they chemically age.
As lithium-ion batteries chemically age, the amount of charge they can hold diminishes, resulting in shorter amounts of time before a device needs to be recharged. This can be referred to as the battery's maximum capacity—the measure of battery capacity relative to when it was new. In addition, a battery's ability to deliver maximum instantaneous performance, or 'peak power,' may decrease. In order for a phone to function properly, the electronics must be able to draw upon instantaneous power from the battery. One attribute that affects this instantaneous power delivery is the battery's impedance. A battery with a high impedance may be unable to provide sufficient power to the system that needs it. A battery's impedance can increase if a battery has a higher chemical age. A battery's impedance will temporarily increase at a low state of charge and in a cold temperature environment. When coupled with a higher chemical age, the impedance increase will be more significant. These are characteristics of battery chemistry that are common to all lithium-ion batteries in the industry.
When power is pulled from a battery with a higher level of impedance, the battery's voltage will drop to a greater degree. Electronic components require a minimum voltage to properly operate. This includes the device's internal storage, power circuits, and the battery itself. The power management system determines the capability of the battery to supply this power, and manages the loads in order to maintain operations. When the operations can no longer be supported with the full capabilities of the power management system, the system will perform a shutdown to preserve these electronic components. While this shutdown is intentional from the device perspective, it may be unexpected by the user.
Preventing unexpected shutdowns
With a low battery state of charge, a higher chemical age, or colder temperatures, users are more likely to experience unexpected shutdowns. In extreme cases, shutdowns can occur more frequently, thereby rendering the device unreliable or unusable. For iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE (1st generation), iPhone 7, and iPhone 7 Plus, iOS dynamically manages performance peaks to prevent the device from unexpectedly shutting down so that the iPhone can still be used. This performance management feature is specific to iPhone and does not apply to any other Apple products. Starting with iOS 12.1, iPhone 8, iPhone 8 Plus, and iPhone X include this feature; iPhone XS, iPhone XS Max, and iPhone XR include this feature starting with iOS 13.1. The effects of performance management on these newer models may be less noticeable due to their more advanced hardware and software design.
This performance management works by looking at a combination of the device temperature, battery state of charge, and battery impedance. Only if these variables require it, iOS will dynamically manage the maximum performance of some system components, such as the CPU and GPU, in order to prevent unexpected shutdowns. 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, a user may not notice any differences in daily device performance. The level of perceived change depends on how much performance management is required for a particular device.
In cases that require more extreme forms of this performance management, the user may notice effects such as:
- Longer app launch times
- Lower frame rates while scrolling
- Backlight dimming (which can be overridden in Control Center)
- Lower speaker volume by up to -3dB
- 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 background may require reloading upon launch
Many key areas are not impacted by this performance management feature. Some of these include:
- Cellular call quality and networking throughput performance
- Captured photo and video quality
- GPS performance
- Location accuracy
- Sensors like gyroscope, accelerometer, barometer
- Apple Pay
For a low battery state of charge and colder temperatures, performance management changes are temporary. If a device battery has chemically aged far enough, performance management changes may be more lasting. This is because all rechargeable batteries are consumables and have a limited lifespan, eventually needing to be replaced. If you are impacted by this and would like to improve your device performance, replacing your device battery can help.
For iOS 11.3 and later
iOS 11.3 and later improve this performance management feature by periodically assessing the level of performance management necessary to avoid unexpected shutdowns. If the battery health is able to support the observed peak power requirements, the amount of performance management will be lowered. If an unexpected shutdown occurs again, then performance management will increase. This assessment is ongoing, allowing more adaptive performance management.
iPhone 8 and later use a more advanced hardware and software design that provides a more accurate estimation of both power needs and the battery's power capability to maximize overall system performance. This allows a different performance management system that more precisely allows iOS to anticipate and avoid an unexpected shutdown. As a result, the impacts of performance management may be less noticeable on iPhone 8 and later. Over time, the rechargeable batteries in all iPhone models will diminish in their capacity and peak performance and will eventually need to be replaced.
Battery Health
For iPhone 6 and later, iOS 11.3 and later add new features to show battery health and recommend if a battery needs to be replaced. These can be found in Settings > Battery > Battery Health.
Additionally, users can see if the performance management feature that dynamically manages maximum performance to prevent unexpected shutdowns is on and can choose to turn it off. This feature is enabled only after an unexpected shutdown first occurs on a device with a battery that has diminished ability to deliver maximum instantaneous power. This feature applies to iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE (1st generation), iPhone 7, and iPhone 7 Plus. Starting with iOS 12.1, iPhone 8, iPhone 8 Plus, and iPhone X include this feature; iPhone XS, iPhone XS Max, and iPhone XR include this feature starting with iOS 13.1. The effects of performance management on these newer models may be less noticeable due to their more advanced hardware and software design.
(Note: Devices updating from iOS 11.2.6 or earlier will initially have performance management disabled; it will be reenabled if the device subsequently experiences an unexpected shutdown.)
All iPhone models include fundamental performance management to ensure that the battery and overall system operates as designed and internal components are protected. This includes behavior in hot or cold temperatures, as well as internal voltage management. This type of performance management is required for safety and expected function, and cannot be turned off.
Your battery's maximum capacity
The Battery Health screen includes information on maximum battery capacity and peak performance capability.
Maximum battery capacity measures the device battery capacity relative to when it was new. A battery will have lower capacity as the battery chemically ages which may result in fewer hours of usage between charges. Depending upon the length of time between when the iPhone was made and when it is activated, your battery capacity may show as slightly less than 100%.
A normal battery is designed to retain up to 80% of its original capacity at 500 complete charge cycles when operating under normal conditions. The one-year warranty includes service coverage for a defective battery. If it is out of warranty, Apple offers battery service for a charge. Learn more about charge cycles.
As your battery health degrades, so can its ability to deliver peak performance. The Battery Health screen includes a section for Peak Performance Capability where the following messages may appear.
Battery Health 5 8th
Performance is normal
When the battery condition can support normal peak performance and does not have the performance management features applied, you'll see this message:
Your battery is currently supporting normal peak performance.
Battery Health 5 850
Performance management applied
When the performance management features have been applied, you'll see this message:
This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power. Performance management has been applied to help prevent this from happening again. Disable…
Note that if you disable performance management, you can't turn it back on. It will be turned on again automatically if an unexpected shutdown occurs. The option to disable will also be available.
Battery health unknown
If iOS is unable to determine the device battery health, you'll see this message:
This iPhone is unable to determine battery health. An Apple Authorized Service Provider can service the battery. More about service options…
Battery Health 5 800
This may be due to having an improperly installed battery or an unknown battery part.
Performance management turned off
If you disable the applied performance management feature, you'll see this message:
This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power. You have manually disabled performance management protections.
If the device experiences another unexpected shutdown, the performance management features will be re-applied. The option to disable will also be available.
Battery health degraded
If battery health has degraded significantly, the below message will also appear:
Your battery's health is significantly degraded. An Apple Authorized Service Provider can replace the battery to restore full performance and capacity. More about service options…
This message does not indicate a safety issue. Your battery can still be used. However, you may be experiencing more noticeable battery and performance issues. A new replacement battery will improve your experience.
Important Battery Message
Battery Health 5 800
If you see the message below, it means the battery in your iPhone is unable to be verified. This message applies to iPhone XS, iPhone XS Max, iPhone XR, and later.
Unable to verify this iPhone has a genuine Apple battery. Health information not available for this battery.Learn more..
Reported battery health information is not available. To have your battery checked, contact an Apple Authorized Service Provider. More about service options.
Learn more about this message as it appears on iPhone 11 and iPhone 11 Pro.
Getting further assistance
If your device performance has been impacted by an aged battery and you would like to get help with a battery replacement, contact Apple Support for service options.
Learn more about battery service and recycling.
Recalibration of battery health reporting on iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max
iOS 14.5 and later includes an update where the battery health reporting system will recalibrate maximum battery capacity and peak performance capability on iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max to address inaccurate estimates of battery health reporting for some users.
Learn more about recalibration of battery health reporting in iOS 14.5.
