If you lost something with a dead battery, there's no way to locate it by using software, so you're just going to have to save up and get a new one.
Yes when the Battery is Dead
Battery's dead?
Plug it into the wall and charge it. It probably has a dead battery. You can restart your iPad by holding down the power button (not the Home button) for 5 seconds.
You do nothing
Your battery is dead. Plug it in and wait for at least 4 hours to recharge. If it doesn't turn on after that, you may need to have your battery replaced. The Apple Store can do that for you.
. The iPad can last 15 hours or more
The iPad mini with retina display has a battery life of 23.8 watts per hour.
iPad has a larger battery so it lasts longer on avetage
Electronic devices usually have a battery or dry cell that stores some energy. In the case of the iPad, the battery is rechargeable.
It's battery powered.
Call apple
Have the battery checked out. It may have a dead cell and not holding a charge,