How many battery cells do you have right now in your phone, watch, toys, and other gadgets? When you think about it, you probably owned hundreds of batteries already, and you are just beginning your life’s journey. Batteries come in different colors, shapes and sizes and we have some cool dry cell facts to share. We bet you can’t imagine a world where phones, watches, toys, and other gadgets did not work unless you plugged them in a wall.
Cool Dry Cell Facts: What Happens Inside Them
The commonest dry cell batteries are sizes AAA, AA, C, D, 9-volt, and some button ones. There are two connectors on the outside. One joins to the negative anode, the other to the positive cathode. So when you see the + sign you know it is next to the positive terminal where the red wire goes.
If we connect a battery to a device, the electricity flows from the negative anode to the positive cathode in the form of electrons. When the battery has used all its energy up, it goes ‘dead’. If it is a single-use cell, then that is the end of its life. Time for recycling.
Cool Dry Cell Facts: What Happens If It Is Rechargeable?
That’s a great question and thanks for asking. When a battery holds full charge, all the electrons are in the anode. When it stops working, it means most of them have moved across to the cathode. Some batteries – but not all – can recharge. When we connect an external power source to them, we reverse the process and put the electrons back where they belong.
However, some get lost along the way. So each time we recharge a battery, it gets a little weaker. That’s why your phone and watch batteries last for less and less time until you replace them. That’s enough cool dry cell facts for today. School’s out, let’s have a party.
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