Why do smartphone chargers stop working?

[neku]

I have noticed that a large number of smartphone chargers stop working after some time. Does erratic power supply or surges in power supply damage the charger or is there any other reason why the smartphone charger stops working? How to prevent damage to the chargers?

 

[eLdavis]

There are many reasons why this happens, for some it could be the unstable power supply, while others it could be a simple issue of misuse.

 

[freelancermaria]

Some smartphone chargers stop working because they can become faulty when you neglect to take care of them. I have had chargers that became faulty due to excessive use.

 

[Kross]

For me, it is the chord that would suddenly just stop working all of a sudden. And that is mostly because of strain.