How did my phone charge so quickly!

[AC Question]

M you samsung s6 was completely dead. I plugged it in using a fast charger and literally 10 minutes later it was at 57%. When the phone was in charge mode i.e it was turned of showing the battery at 6% however when I turned it on the battery icon showed 57% weird or not?

 

[B. Diddy]

Welcome to Android Central! Has the battery been acting strange in other ways? Watch for sudden battery drain. What you're seeing might be a sign of a defective battery.