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A battery produces electricity because electrons flow from one reactant in the battery's chemical reaction to another reactant. However, once one of the reactants is completely used up, the chemical reaction stops, thus also stopping the flow of electricity. Now, how does a battery recharge? Well, the details of this are a bit too complicated to get into, but I can provide a abbreviated explanation.
A battery charger produces an electrical force that actually causes the battery's chemical reaction to reverse. Thus, when a battery is dead, it has all the products and no reactants. A battery charger will force those products to react with each other and reform the reactants. Once that happens, the battery is ready to go again. This doesn't work for all batteries, however. That's why many batteries are not rechargeable.
Hope this helps!
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoRechargeable batteries generate electricity by chemical reaction between two or more chemical compounds and/or elements inside.
When one or more of these become used up, or somehow corrupted, then the battery will fail to make electricity.
Wiki User
∙ 13y agoAfter you recharge the battery so many times it wont hold a charge anymore. It happened to me with my tv remote.
Wiki User
∙ 10y agoBecause dey run out-Aristotle Cruz
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