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Genre：Video
Author：BrainPOP
Size：392KB
Date Published：November 2, 2005
Description:
Batteries is a BrainPOP Science and Technology video launched on November 2, 2005. Over in the past 12 years, the update is now launched in October 12, 2017.
Tim was sleeping. Moby keeps reflecting a light on Tim's face because the camping trip doesn't start until Monday. At the end, another reflecting light shows up after Moby takes them out.
Transcript:
Text reads: The Mysteries of Life with Tim & Moby
Tim is snoring in bed. A bright circle appears on Tim's face.
Tim: Ugh! Moby, what are you doing?
Moby: Beep.
Tim: Test your batteries some over time. The camping trip isn't until Friday!
Moby hands Tim a typed letter. Tim turns the lamp on and reads a letter.
Tim: Dear Tim & Moby, I just put new batteries in my flashlight, but how do they make it light up? From, Gabo. There are all kinds of batteries that can be as small as a pill or the size of...Moby.
An image shows Moby holding out a small battery in his hand. A giant battery-like object falls on Moby.
Tim: Triple A, double A, C, D, and 9 volt batteries used in your flashlights and radios are called dry cell or alkaline batteries.
Text reads: dry or alkaline batteries
Tim: They're called dry cell because they have a paste or gel inside instead of a liquid like some other batteries. Even so, the operating principles of most batteries are quite similar. Batteries produce electricity by transforming the stored chemical energy into electrical energy. The 3 main parts of a battery are the anode, cathode, and electrolyte.
Text reads: anode, cathode, and electrolyte
Tim: The negative electrode or anode is usually a metal such as zinc that emits electrons. The positive electrode or cathode is an oxidized metal like manganese dioxide that collects electrons. And the electrolyte is the pasty mixture of chemicals that conducts the electricity.
Moby: Beep?
Tim: Well, the battery has to become part of a circuit before it can generate power.
Text reads: circuit
Tim: The electrons remain in the negative terminal of the battery until it becomes part of a circuit. The negative anode metal goes through a process called oxidation. This changes the metal of the anode that becomes unstable and releases electrons.
Text reads: oxidation
Tim: These electrons flow through the circuit and produces a steady current to light up the bulb. The electrons return to the positive cathode and combine with their molecules in a process called reduction.
Text reads: reduction
Tim: The molecules are transformed, and they react with the electrolyte, which in turn, reacts with the unstable molecules that remained from the oxidation in the anode. The reactions have become full circle, and they keep a steady flow of electrons.
Moby presses the tiny button on top of a battery, making his chest lights light up.
Tim: When the circuit is complete, the cycle continues to repeat until the materials in the battery are exhausted.
Moby’s flashlight runs out of battery power.
Tim: Then it's time to change the battery. *yawns* And now it's time for me to go to sleep!
Moby releases the batteries off the flashlight and lands them on his hand. Tim turns the lamp off.
Tim: There are other kinds of batteries too; the rechargeable batteries you see in cell phones, laptops, and other electronic devices. And... *yawns* the batteries in cars are another type all together... *yawns* with a liquid electrolyte.
As Tim snores again, a bright light reappears on Tim's face, making him irritated.
Tim: Argh!
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