We all know the drill: you wake up in the morning, check your notifications, and by mid-afternoon your iPhone is already gasping for energy. Whether it’s constant charging breaks, unexpected shutdowns, or that dreaded “Battery Health” warning, it’s frustrating when your trusty device can’t keep up with your busy day.
Why Batteries Age and What It Means for You
It’s no secret that over time, lithium-ion batteries lose their ability to hold a charge. Apple even notes that after around 500 full charge cycles, your iPhone’s battery capacity can drop below 80% of its original level. In simple terms, even if your phone is still in great shape, an aging battery can:
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Shorten your screen time
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Lead to performance slowdowns or unexpected shutdowns
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Cause your phone to heat up during use
Before you consider upgrading to a brand-new phone, think about this: replacing your battery might restore your device’s performance and give it a new lease on life—without the hefty price tag of a new phone.
A Simpler, More Sustainable Solution
Modern replacement batteries—like our DEJI series—are designed to seamlessly restore your iPhone’s reliability. Here’s why switching out your old battery could be the best decision you make:
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Seamless Integration: DEJI batteries are crafted to meet or exceed Apple’s original specifications. That means your device recognizes it just fine, so you won’t run into annoying error messages or compatibility issues.
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Extended Usage: Some high-capacity models even boost your daily runtime by 10–20%. Imagine breezing through your meetings and errands without scrambling for a charger!
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DIY-Friendly: We know that many people prefer to handle small fixes themselves. That’s why each battery comes with a complete tool kit and easy-to-follow video tutorials. No appointment at the repair shop needed.
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Certified for Safety: With certifications like ISO9001, CE, ROHS, KC and more, you can trust that every battery delivers high performance and safety.
What Others Are Saying
Here’s what a few satisfied users from across the country have to say:
“I was on the fence about replacing my iPhone battery—until I tried DEJI’s. My iPhone 11 now holds a charge well into the evening, and I haven’t needed to rush out for a charger all day!”
— Andy, San Francisco
“I never thought I’d be changing my phone battery on my own, but the tutorial was so clear. In under 30 minutes, my iPhone felt brand new.”
— Sarah, Austin
So, How Do You Know When It’s Time?
Ask yourself:
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Does your iPhone’s “Battery Health” fall below 85%?
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Are you noticing a significant drop in your usual daily battery life?
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Would you rather extend your current iPhone’s life for another year or two instead of purchasing a new device?
If the answer is “yes” to any of these, then a high-quality replacement battery may be just what your phone—and your wallet—need.

Ready for a New Chapter in Battery Life?
Replacing a battery doesn’t have to mean a new device. With options like our DEJI battery designed for everything from iPhone 6 to iPhone 16, you can enjoy a reliable, extended battery life that’s both budget- and environmentally friendly.
Click here to explore our battery solutions and find your perfect match. ››
It’s not about keeping up with the latest model—it’s about keeping your trusted device running as long as you do. When your iPhone’s battery begins to fade, you deserve an easy, safe, and smart solution. Here’s to longer days and fewer charging cables cluttering your life!
❓Frequently Asked Questions
1. How do I know if my iPhone battery needs to be replaced?
You can check your battery health by going to:
Settings → Battery → Battery Health & Charging
If the Maximum Capacity is below 85%, or you often experience quick battery drain, overheating, or random shutdowns, it's probably time to replace your battery.
2. Is your battery compatible with the latest iOS updates?
Yes. DEJI batteries are fully compatible with the latest iOS versions, including iOS 18 and iOS 26 Beta. No pop-up warnings, no system errors.
3. Will I lose any data when replacing the battery?
No, your data stays safe. Battery replacement does not affect your phone's memory or apps.
Still, we always recommend doing a quick backup before starting—just to be safe.
4. Can I replace the battery by myself? Is it difficult?
Absolutely! Every DEJI battery comes with a full DIY tool kit and step-by-step video tutorials.
If you can follow basic instructions and have 30–45 minutes, you can do it yourself—even if it's your first time.
5. What if I don’t want to install it myself?
No problem. You can bring the battery to a local phone repair shop. Most technicians will help you install it for a small fee.
6. What’s the difference between your battery and Apple’s original battery?
DEJI batteries match Apple’s original quality standards, and in many cases, offer higher capacity for extended use.
Our batteries are made with A+ grade lithium cells and go through strict quality control and safety testing.
7. Does your battery support fast charging?
Yes. Our batteries support fast charging on compatible iPhone models (iPhone 8 and newer) using a proper PD charger and cable.
8. How long does the battery last after replacement?
Our batteries are rated for 500+ full charge cycles. For most users, this means 2–3 years of regular daily use with excellent performance.
9. What warranty do you provide?
We offer a 12-month warranty on all our batteries. If you experience any product-related issues, just contact our support team—we’re happy to help.
10. Is international shipping available?
Yes. We ship globally, and most orders are processed within 24–48 hours. Shipping times vary depending on your location.
11. Will the battery health go back to 100% after replacement?
Yes. Once installed correctly, the battery health indicator will typically show 100%, and you’ll notice immediate improvements in usage time and charging performance.
12. Will your battery trigger the “Important Battery Message” warning?
Yes, Deji large capacity high quality diagnostic compatible battery, no pop-up window, 100% healthy, decoded battery for iPhone 12 and above

sales@batterydeji.com



