[Anonymatt]

The stock wall charger charges at 1 A, but other wall chargers, and charging via USB typically charge at less ( I think 500 mA). If you are using your old chargers, or charging via USB, that could be the reason. Someone else pointed out, and I've come to agree with, that it takes ~1 minute to charge up ~1%, and I can usually get a full charge in ~1hr 40 min (100 min).