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⚠️ The Risk of Unsafe Battery Replacement
As mobile phones age, battery replacement becomes a common need.
Check your phone's battery regularly for signs of damage, leakage, or swelling.
Consumers typically have several options:
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Visit OEM-authorized service providers for official battery replacement. If your phone is under warranty or you are cautious, it is okay to choose an official battery replacement.
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Buy aftermarket batteries from third-party sellers and install them manually or at independent repair shops.
While the second option is often more affordable and accessible, it comes with significant safety risks.
Dangers of Uncertified Aftermarket Batteries
Industry reports and real-world cases reveal that fires and explosions have occurred at both the cell and pack levels in many unverified aftermarket batteries.
Key concerns include:
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Lack of certification (e.g., CE, FCC, RoHS, UN38.3, etc.)
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Poor-quality control and low-grade internal components
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High internal resistance, fast power drain, overheating, swelling, or even explosion.
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The actual charge and discharge energy during the test process is related to the internal resistance and the charge and discharge power (current). The larger the internal resistance and the greater the charge and discharge power, the lower the proportion of energy effectively utilized, and the higher the proportion of energy consumed by internal resistance heat generation. (8 Key Parameters of Lithium-Ion Batteries)
In extreme cases, this can result in thermal runaway, causing injury, property damage, or personal harm.
✅ How to Minimize Risk
To ensure safety, consumers are advised to:
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Only purchase batteries from reliable, certified brands
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Avoid suspiciously cheap, unbranded products without proper packaging
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Look for compliance with international safety standards and tested performance
If you’re confident in your skills, a trusted third-party iPhone battery is a cost-effective alternative to the official one—often cheaper, reliable, and sometimes even includes installation.
Recommended Brand: DEJI Battery
Shenzhen Huidefa (DEJI) Technology Co., Ltd., established in 2006, is a professional manufacturer specializing in mobile phone batteries and chargers. The company owns and operates the trusted brand DEJI.
Company Highlights:
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Two manufacturing facilities in Shenzhen and Dongguan, covering over 20,000㎡
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Equipped with advanced SMT lines and automated machines
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Founder/lead engineer with over 20 years of experience in the battery industry
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Monthly R&D updates to support the latest iPhone and Android models
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Certified with CE, FCC, RoHS, PSE, KC, UN38.3, MSDS, IEC62133, CB, TUV us, UKCA, Anatel
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ISO9001-certified quality management system
Advantages of DEJI Diagnostic Batteries:
| Feature | DEJI Battery (Original IC Design) | Common Aftermarket Batteries (MCU-based) |
|---|---|---|
| Durability | Long-lasting and highly stable | Poor durability, frequent failures |
| Temperature Control | Normal operating temperature | Easily overheats, drains fast |
| Safety & Stability | Low self-discharge, no swelling | High risk of swelling and damage |
DEJI diagnostic batteries are ideal for refurbished smartphones and professional repair service providers looking for safe, efficient, and stable battery solutions.
Ideal for:
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Mobile phone repair chains
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Refurbished phone factories
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Cross-border e-commerce sellers (Amazon, AliExpress, etc.)
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Distributors and wholesale resellers
If you’re in the smartphone repair, refurbished phone, or battery supply business, DEJI is a smart choice that balances safety, performance, and cost-effectiveness.