In today’s world, where lithium-ion battery technology hasn’t seen major breakthroughs and new energy batteries haven’t yet been integrated into electronic devices, the issue of battery life remains a persistent concern for smartphone users. Fast charging technology has come as a significant relief, allowing users to charge their phones in a fraction of the usual time. This development has effectively addressed the battery life problem from a different angle. However, many people still mistakenly believe that fast charging adapters can be used interchangeably. To clarify these misconceptions, I conducted two experiments: one to verify the compatibility between fast-charging phones/chargers, and another to examine the charging speed of non-original chargers on an iPhone 6s.
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For the first experiment, I tested various charging heads with an iPhone 6s to see how they performed in terms of speed. Many users might recall that when using third-party charging heads or cables with an iPhone, the device would sometimes display a warning saying "This cable or accessory has not been certified," causing the charging current to be restricted, thus significantly increasing the charging time. Nowadays, such warnings seem less common, but does this mean that non-original charging heads perform similarly to the original ones in terms of charging speed? Let’s explore this through our experiment.
Test setup: iPhone 6s (Hong Kong version, iOS 9.3.1), original charging head, a third-party charging head, and a USB outlet board. I monitored the charging process in real-time using a USB voltage/current detector, checking the voltage/current values at 10%, 50%, and 95% charge levels. If the voltage/current values were consistent across these readings, it would suggest similar charging speeds.
The results showed that both the third-party charger and the original charger provided the same output power during the fast charging and trickle charging phases. The USB outlet board had a higher output voltage, leading to a faster charging speed. Thus, the charging speed rankings (estimated) were: USB outlet > original charger = third-party charger. However, the performance of different third-party chargers varied.
In the second experiment, I tested the compatibility of fast charging heads with different phones. Many people assume that any fast charging head can be used interchangeably, regardless of the phone's brand. This isn't true. Fast charging relies on specific protocols, and the charging head must support the same protocol as the phone for fast charging to work. For instance, an OPPO R9 requires a VOOC fast charger, a Moto X needs a Qualcomm QC charger, and a Meizu PRO 6 works best with its own MX5 charger.
I tested three phones with three different chargers and recorded the voltage and current over 15 minutes starting from a 10% charge. The results confirmed that incompatible fast charging protocols result in slower charging speeds, emphasizing the importance of matching the correct charger with the phone.
In conclusion, some non-original chargers can charge iPhones faster, but when it comes to fast charging, the charger must support the same protocol as the phone. Always check the specific model requirements before buying a third-party fast charger to ensure optimal performance and avoid unnecessary expenses.
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