iPhone Battery Draining Fast? A Guide to Choosing a Used Smartphone for Savings and Peace of Mind
Is your battery draining quickly? We can help!
"I just bought this a year ago, but the battery drains abnormally fast." "Is it better to buy a used phone than replace the battery?"
Many people probably have these questions.
This article carefully explains everything from the causes of battery drain to countermeasures, and tips for choosing a used iPhone.
In fact, just reviewing how you use your current iPhone might extend its battery life. And by effectively utilizing a used smartphone, you can enjoy a comfortable smartphone life while saving money.
We provide information to help you avoid mistakes, especially if you prioritize cost-effectiveness but are cautious.
Checking the Causes of Battery Drain

If you feel your iPhone's battery is draining quickly, first review your daily usage habits. There's a chance it's draining rapidly in unexpected ways.
Screen Brightness / Auto-Brightness
If your screen is constantly too bright, your battery will drain rapidly. The basic approach is to turn on auto-brightness and manually lower the brightness when necessary. You can easily adjust this from "Display & Brightness" in the Settings app.
Background App Refresh / Notification Settings
If apps are frequently refreshing in the background, they will consume battery without you realizing it. Turn off background refresh for unnecessary apps from "Settings" → "General" → "Background App Refresh". Additionally, if you have too many notifications, the display will light up more often, so limiting them to only what's necessary is also effective.
Location Services / 5G Connection
Location services for map apps and social media consume a lot of battery. While 5G connections are fast, they also consume a lot of power, so it's a good idea to set your phone to "4G priority" when 5G isn't essential.
Increased Consumption Immediately After OS Update
Immediately after an iOS update, battery consumption may temporarily increase due to system optimization. Monitor it for a few days, and if the issue persists, consider restarting or factory resetting your device.
Immediate Power-Saving & Longevity Tips
If you feel your battery is draining quickly, there are many settings you can try right away. Here are some techniques that offer power-saving benefits with simple adjustments.
Low Power Mode
Low Power Mode, which can be enabled from "Settings" → "Battery," is a classic feature that reduces battery consumption by limiting CPU speed and background processing.
Wi-Fi Prioritization
Wi-Fi consumes less power than cellular data. Aim to always use Wi-Fi when you are not out and about.
Reduce Motion / Dark Mode
Reducing screen motion can lessen the load on the GPU. Turn on Reduce Motion from "Settings" → "Accessibility" → "Motion". Additionally, utilizing Dark Mode can further save power on devices with an OLED screen.
Turn Off Keyboard Haptics / Use Airplane Mode
Keyboard haptic feedback can also affect battery life. If not needed, turn it off from "Settings" → "Sounds & Haptics." In areas with poor signal, using Airplane Mode can prevent unnecessary communication.
Battery Condition to Check Before Buying a Used iPhone

When choosing a used iPhone, the most important checkpoint is "battery condition." If you buy one without knowing this, you might quickly become dissatisfied.
A Baseline of 80% Maximum Capacity or More
Check the maximum capacity in "Settings" → "Battery" → "Battery Health & Charging." If it's below 80%, degradation has progressed, and usage time will be shorter. When buying used, it's recommended to choose one with 80% or more as a guideline.
Choose with Confidence at PRODIG
All used iPhones handled by PRODIG clearly state their battery and exterior conditions. They are operationally checked and cleaned, and many come with a warranty. This makes it a safe option even for first-time used phone buyers.
[Click here for iPhone product list] https://prodig-shop.com/collections/iphone
Battery Replacement or Handling Battery Degradation

If you like your current device but the battery doesn't last, you have two options: replacement or buying a new one.
Battery Replacement at Apple Official Service
Battery replacement at an Apple Store or authorized service provider uses genuine parts and comes with a 1-year warranty. While reassuring, it can cost over 10,000 yen depending on the model.
Buying a New Device and Using Trade-in at PRODIG
PRODIG also offers a trade-in service, allowing you to sell your current iPhone at a high price and use those funds to purchase a used device with good battery condition. We offer services from online appraisal to instant cash payment at our Akihabara store, and the process is simple.
【Click here for the trade-in website】https://prodig-kaitori.com/
Finally
If you feel your iPhone's battery is draining quickly, first review your usage habits. After that, it's ideal to decide whether to "replace" or "buy a new one."
Used smartphones are often perceived with anxiety, but from a trustworthy shop like PRODIG, they become a smart choice that combines peace of mind, good value, and practicality.
First, check the inventory list and trade-in prices to find the perfect device for you.
[Used iPhone List] https://prodig-shop.com/collections/iphone
[Trade-in Counter] https://prodig-kaitori.com/