I noticed that after the 5.0 update my battery doesn't get nowhere as warm as it used to when charging. I have my phone charging as i type, and it's laying on my bed.
In the past i had to charge my phone on a hard flat surface, such as the kitchen counter, nightstand, t.v. stand, etc.
Also, i don't know if this happened before and i just didn't notice it until today. The charger part that goes into the electrical socket immediately cools down once it reaches 100% charged.