Is a used iPhone with 100% battery life suspicious? How to choose a used phone
This article explains the battery life of used iPhones for those considering purchasing one.
Some of you may feel suspicious of a used iPhone with 100% battery capacity.
However, there are actually used devices with a maximum battery capacity of 100%.
In this article, we will broadly explain the batteries of used devices and the criteria for choosing them.
We hope this information will be helpful to those looking for a used device with a high maximum rechargeable battery capacity.
What is an iPhone battery in a used device?
Used devices use rechargeable "lithium-ion batteries."
These batteries can be charged many times, charge quickly, and are resistant to degradation, so they are widely used in various applications today.
However, they are consumables and degrade through charging and being left unused.
Therefore, under normal use, it is generally recommended to replace them every 2 to 2.5 years.
iPhones use lithium-ion batteries with these characteristics.
What happens when battery capacity decreases?
When the maximum charge capacity of an iPhone's rechargeable battery decreases, the battery drains quickly, and the iPhone's performance itself declines.
The most noticeable symptom is that it can no longer fully charge and runs out of power quickly.
Also, the power may suddenly turn off while in use.
However, the maximum charge capacity of the rechargeable battery affects not only power-related issues but also apps, speakers, screen brightness, and device performance.
For example, you may notice the following symptoms:
【Changes in performance due to decreased maximum rechargeable battery capacity】
- Apps take longer to launch
- The device's performance itself declines, making scrolling difficult
- Speakers produce less sound volume
- Screen brightness becomes dim
- Camera flash becomes unavailable
- Apps reload during use
While an iPhone's battery draining quickly is an issue, the symptoms listed above can also be annoying.
It is generally considered that device performance degrades when the maximum battery capacity reaches around 80%.
Points to note when purchasing a used iPhone
Now, let's look at what points you should pay attention to when considering purchasing a used iPhone.
Point 1: Check the battery status
First, it is important to check the battery's condition.
You can do this from the iPhone's Settings screen.
Tap on "Battery" in the Settings screen.
Then, tap on "Battery Health."
The next screen will display "Maximum Capacity XX%."
The "Maximum Capacity" indicates the current maximum charge capacity of the rechargeable battery.
As explained earlier, device performance degrades at around 80%.
Choose a device that shows the highest possible percentage.
Point 2: The battery itself may be degraded
With used iPhones, the battery itself can show signs of degradation.
Some people who bought a used iPhone with 100% battery capacity feel that the battery drains quickly.
If the battery drains quickly even though the maximum rechargeable battery capacity seems fine, the battery itself might be old.
Battery degradation refers to deterioration due to aging.
Lithium-ion batteries degrade even when left unused, without being charged or discharged.
A degraded battery may have reduced maximum instantaneous power delivery capability or may not charge smoothly.
While it can be difficult to tell if a battery is old, choosing a retailer that offers a warranty will reduce the risk.
How to choose a used iPhone with a battery capacity close to 100%
Some of you may find "100% battery on a used iPhone suspicious."
However, there are actually used devices with a maximum rechargeable battery capacity close to 100%.
A higher maximum charge capacity is always better.
Now, let's explain how to choose a used device with a maximum battery charge capacity close to 100%.
Method 1: Choose new/unopened items
The first method is to choose new or unopened items.
Among used devices, there are also so-called "new old stock" items.
Since these devices have not yet been charged or discharged, the maximum rechargeable battery capacity is 100% despite being used.
Although there is a possibility that the battery may have slightly aged due to the passage of time, choosing new and unopened items eliminates concerns about the maximum rechargeable battery capacity.
Method 2: Choose a relatively new model
Choosing a newer model is also a recommended method.
Models that have been on the market for many years tend to have been charged many times.
On the other hand, with newer models, it's possible that the previous owner didn't use it much before selling it.
Even if it's used, some rechargeable batteries still have 90% or more of their maximum capacity.
They should be easier to find than new, unopened items, and choosing a newer model from the lineup is recommended.
Method 3: Choose a used iPhone with a replaced battery
Finally, we'll introduce a method for choosing a used device with a replaced battery.
Some retailers sell iPhones with new batteries installed.
Even though the main unit is used, the battery is new, so there will be no decrease in the maximum charge capacity of the rechargeable battery.
Some people may be skeptical about a used iPhone having 100% battery life.
However, it's important to know that in some cases, batteries are replaced and sold in better condition.
A used iPhone with 100% battery is not suspicious
How was it?
We hope this article has helped you understand more about used device batteries.
A used iPhone with 100% battery may seem suspicious.
However, there are legitimate reasons, such as being an unopened item or having had the battery replaced.
The official online store for used smartphones and tablets "PRODIG" sells a wide variety of used devices, from iPhones to iPads and Androids.
Of course, we also have new models and S-rank products, so you're sure to find a used device with high maximum battery capacity.
Click here for a list of used iPhone products offered by PRODIG
Click here for a list of used smartphone products offered by PRODIG
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