Can A Bad Charger Ruin My Phone. Fortunately there are precautions to take when buying a charger. The fake charger that you purchased may actually be killing the battery that it was working to revive.

However keeping the case on while your phone is charging might actually be doing harm to your battery. Serious damage to the phones electronics. In general yes.
If youre unsure whether theres a right way to charge your phoneor whether charging it too long too often or too fast can damage the batteryyoure not alone.
If it were to fail to deliver proper 5 volts it could overload the phone and cause damage. If it were to fail to deliver proper 5 volts it could overload the phone and cause damage. Is wireless charging bad for my smartphone. While it is a quite rare situation that occurred to me if you can avoid having to pay hundreds of dollars you might want to consider this.

