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How to Check iPhone Battery Health

If you are wondering about how to check your iPhone’s battery health, we’ve got just the guide for that. By determining how many battery cycles your iPhone battery has completed, we can estimate it’s remaining battery lifespan.

The more full charge cycles you complete, the sooner your battery will have to be replaced.

What are battery cycles and why should I care?

Your iPhone runs on a specialized battery, which by principle has a limited lifespan. By using the battery (correctly or incorrectly), we are shortening the lifespan by completing so-called battery cycles or charge cycles. A full cycle is defined by a full discharge and recharge. This can happen in a day, or spread across multiple charge and discharge periods. Your battery can only complete so many cycles until it slowly starts to lose capacity, which is a continuous process of wear.

Battery Hygiene: A typical iPhone is constantly charging or discharging, as long as it is operational. You can make the most of your iPhone’s battery by trying to stay within the 20% to 80% range, this will extend the lifespan. On the other hand, if you deep-discharge your iPhone often (going to 0% until it shuts off completely) and leave it connected to the charger after it has reached 100% of charge, you will run the battery down a bit quicker, in some cases even substantially quicker.

Don’t confuse lifespan with runtime, however. To maximise the duration your iPhone is kept running on one charge, try and apply the above advice (to keep your battery healthy) but fully charge it when you spend a longer period of time away from a charger. Charging to 100% and keeping the iPhone connected to the charger will result in “trickle-charging”, a repeated act of topping off and slightly discharging the battery until it has reached its maximum charge. Charging this way provides you with the maximum battery life, but adds to the wear and tear of your battery. Finding the right balance is key.

How many battery cycles can I expect from my iPhone?

Apple claims that after 400 complete cycles, the iPhone’s battery will retain around 80 percent of the design capacity. This depends on your usage patterns and external variables such as usage temperature. If you live in a really hot or really cold climate, your iPhone’s battery will have a shorter life. Last but not least, leaving it fully discharged for days or weeks is probably the worst habit you can cultivate with respect to batteries. Keep it charged!

How can i check my iPhone battery health statistics?

If your device is jailbroken, you’ll find a number of fitting tweaks in the Cydia store. Users that refrain from jailbreaking can also access their iPhone battery health data by using a free tool called “iBackupBot for iTunes”, which is available for Mac and PC (Windows).

Install the tool from the developer’s website. Then connect your iPhone to your computer. The tool should detect your device automatically and list it in the panel on the left hand side of the window. Click on the name of your device, then select “More Information” to get a handy overview of your iPhone battery health information. See my numbers below. The tool should list the Cycle Count (explained above) and the “FullChargeCapacity”.

By comparing the latter value to your “DesignCapacity”, you can get a good estimate as to how worn down your battery is. The further apart the two numbers are, the sooner you are going to need a battery replacement. You may even have a bigger FullChargeCapacity than it was designated by design, that is nothing to worry about: It just means that you are practicing excellent battery hygiene, as explained above.


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