How long does the iPhone 7 Plus take to charge?

I've noticed that my iPhone 7 Plus takes roughly 3 hours to a complete charge, from maybe a 10%. I have also noticed that the battery life is not as great as advertised by the company. I am not sure if it may be my reception coverage, as I have seen articles about it, but still have the same issue while at home connected to the Wi-Fi where the battery does not last that long. I also make sure that all location features are turned off, the brightness is kept to a minimum where I could actually see and make sure to turn the screen off when not in use. Will I be experiencing issues with my phone? Should I bring it in to an Apple Store for a check up?

In conclusion, the battery drains quickly and charges very slowly. What may be the problem?