Yes, It just drains your battery. Nothing more!!(No adds)
Why?
No specific reason for this, but:
*You may want to watch your battery level going down in minutes with your own eyes.
*You may not want to charge your battery before it completely goes down, though this has no good!
*You may want your friends to concentrate on you instead of their phones.
*You may challenge your friends to see whose battery is the best!
*Or, you may just want to do it for nothing at all.
I hope you enjoy!!