I got a brand new battery (Samsung branded, so "original") a month ago. But...it takes 1h40mins to fully charge from 0 to 100%. I remember the S5 took like 2h at the very minimum to charge from 10 to 100% some years ago with its first battery. Did I just get a lemon with twice as small battery capacity (Again, everything looks like the original battery. Says it's Vietnam-Korean and has a manufacturing date as well at the bottom left corner.). I flashed a stock 6.0.1 ROM to see if there was some fast charging option left enabled from the ROM/kernel I am on but it still said it needed around 1h40mins for a full charge from 0 to 100%. Wtf? Help, please 
PS: I can get 4h SOT and around 10h total time with watching YouTube via WiFi for 2 hours and the other 2 doing other stuff around the web and other apps. But this charging time bothers me, it was not as fast as it is now.
PS: I can get 4h SOT and around 10h total time with watching YouTube via WiFi for 2 hours and the other 2 doing other stuff around the web and other apps. But this charging time bothers me, it was not as fast as it is now.