Most people only replace their phone charger once it stops working altogether, but experts say a faulty adapter or cable usually gives off warning signs well before it fails completely, according to BGR.
Ignoring these symptoms can lead to slow charging, damage to the smartphone and even a fire risk, the outlet reported.
Visible damage to the cable or adapter
The most obvious reason to replace a charger is visible external damage. If a cable has developed cracks, frayed areas or exposed wires, or if the connector has become bent, it is no longer safe to use.
Sparks, smoke or a burning smell during charging are considered equally dangerous signs. If any of these symptoms appear, the device should be unplugged immediately and not used again, because of the risk of fire.
Phone charging with interruptions
Even if a charger keeps working, that does not mean it is fully functional. If a charger is more than one or two years old, it is worth paying attention to how effectively it charges the device.
For example, a charger may start working intermittently, with the phone charging normally at times and the process suddenly stopping for no obvious reason. Another warning sign is charging taking longer than before, even when using the same cable and adapter. These faults tend to worsen over time, so replacing the charger should not be delayed.
Charger overheating
It is normal for an adapter to warm up slightly during use. However, if the casing becomes too hot to hold, that is cause for concern.
Excessive heat can indicate damage to internal components or wiring. In that condition, a charger can not only damage a smartphone's battery but also cause a short circuit or a fire.
Cable not staying in the port
If a charging cable keeps falling out of the phone, forcing the user to find a specific angle or hold the plug in place by hand, the problem should not be ignored.
Forcing a connector into the port can damage the phone's charging port, and repairing it costs significantly more than buying a new, quality charger.
Experts also advise against cutting corners when choosing a replacement. Certified chargers from trusted manufacturers tend to last longer, provide a more stable power supply and better protect a smartphone from power surges.
USB-C became the standard connector for most smartphones and gadgets in 2026, though not every USB-C cable supports fast charging even if it physically fits the port.
