There is nothing - absolutely nothing - that can never run out of energy.
The battery "is" not energy; it's a battery. The battery has chemical energy stored. When moving a toy, the battery releases electrical energy; i.e., some of the chemical energy in the battery is converted to electrical energy.
A battery is a chemical source of energy that produces direct current, DC. Some are rechargeable; some are not.
There are protons, neutrons, and electrons inside everything that you can touch. If you provide a path for them outside the battery, electrons will flow from the battery's negative terminal to the positive one, and supply some energy on the way that you can use to run things or heat things with.
electrical, chemical, heat, and light energy
Some Things Never Change was created in 1996.
When you're charging a battery, you're pushing electric energy back into the battery. But not all energy is taken up by the battery. Some turns into heat.
Electronic devices usually have a battery or dry cell that stores some energy. In the case of the iPad, the battery is rechargeable.
Well, a normal battery, a car battery, I can't think of more ! ------------ All chemical substances have chemical energy.
Energy stored in a spring; gravitational potential energy; chemical energy; nuclear energy.
Some Things You Never Get Used To was created on 1968-05-21.
use a battery
To make a rechargeable battery have electrical energy, it needs to go through a charging process where it stores electrical energy. Thermal energy is a byproduct of the charging and discharging processes due to internal resistance and inefficiencies in the battery, so the battery naturally generates some thermal energy when in use.