Help Why would being in an emergency room drain the battery of my phone so quickly?

[Ground Sloth]

I was in the emergency room of a hospital earlier today, and the battery life of my Samsung S6 inexplicably dropped from 95% to 25% within about 2 hours. During that time, all I did was make a few brief phone calls, check my email, and peruse some articles on Wikipedia. Watching 2 hours of YouTube videos in 720p usually won't even drain the battery that much. What the heck happened? Was it because of interference?

 

[bcrichster]

It has to do with the amount of signal connecting that it's trying to do.. Most hospitals have horrid phone signal and now provide WiFi. Shuto off cellular data and use their WiFi instead. That should help tremendously

 

[Leon Marco]

As @bcrichster said the strength of the connection is pretty weak in hospitals. Now because of that you phone tries with all its might to connect to a network which uses a lot of battery. Because of this people are usually warned to not to keep a phone next to your body when the connection is week because you don't know what strong waves the phone is emitting just to connect to a network.

 

[mikedt]

Some emergency departments, ICUs, etc. you're supposed to turn phones off.