ELI5, Battery life

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I just went out to buy some 9 Volt batteries because the fire alarm decided to be my alarm clock today and tell me, quite loudly, it was hungry and needed more batteries (/s). I replaced the battery and went to go pick up some more batteries for when the other fire alarms require replacement batteries, and I had thought, if those batteries stay in the package for an extended amount of time, will they still have the same amount of life in them as when i first bought them? Or will they lose power and life, even though they are sitting in a sealed package?

In: Technology

5 Answers

Anonymous 0 Comments

Lithium batteries contain a solution inside of them that changes form to release energy. Essentially when the battery is discharging the solution inside of them transforms into another state that releases electrons and creates power, and unlike single use batteries this solution can be returned to it’s original form when you recharge it. You can think of it like a spring. When your using it it slowly spreads out and loses energy, and by charging it you compress it again. Unfortunately this process isn’t perfectly efficient and it’s thought that this solution can also react with the casing around the battery and turn it into a type of salt. The more times you use the battery (cycles of charging and discharging) the more of this solution turns into this salt and the less is left to store energy.

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