Default Charging and Charging time

Hi,

How long do you need to charge from (let say) 10% to 100%?

In my case, I need about 4 hours 30 minutes. That was really long.

Btw, can I use the old charger from the HTC Magician? I read the specification is the same though.
Nexus 5 : Android 4.4.1 stock ROM, stock recovery, rooted