charging from 'what' ?
A plug in the wall charger/adapter or a PC ??
There is a HUGE difference.
If talking about a USB port on a PC, it can easily be that the USB port setup has changed and will NOT allow 'fast' charging ? if the cable is 'smart' , what is it set for ??
Then there's which USB ? USB1,1.1,2.0,3.2,4.1,???
Oh yeah..which phone and HOW is it setup to charge ? How many aps are installed and running ? ALL running aps consume power and will slow down the recharge rate/time.
Easily 101+ reasons for 'slower' recharge time...