Why do batteries die but then come back to life? - podcast episode cover

Why do batteries die but then come back to life?

Oct 18, 20133 min
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Episode description

Batteries -- particularly car batteries -- seem to go dead and then come back to life after a resting period. How does this self-recharging feature of batteries work? Find out in this episode of BrainStuff.

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Transcript

Speaker 1

Your photos, music and documents are irreplaceable. Protect them with Mosey by e m C, the most trusted name and cloud Backup. Back up your files today and save ten percent with promo code. Brain Stuff at Mosey dot com m z y dot com. Welcome to brain Stuff from how Stuff Works dot com where smart happens Him Marshall Brain with today's question, what is the difference between a normal lead acid car battery and a deep cycle battery? People who have recreational vehicles and boats are familiar with

deep cycle batteries. These batteries are also common in golf carts and large solar power systems, where the sun produces power during the day and the batteries store some of that power for use at night. Both car batteries and deep cycle batteries are lead acid batteries that use exactly the same chemistry for their operation, and the differences in the way the batteries optimize their design. A car's battery is designed to provide a very large amount of current

for a short period of time. This surge of current is needed to turn the engine over during starting. Once the engine starts, the alternator provides all the power that the car needs, so the car battery may go through its entire life without ever being drained more than or so of its total capacity. Used. In this way, a car battery can last a number of years. To achieve a large amount of current, a car battery uses thin

plates in order to increase the surface area. A deep cycle battery is designed to provide a steady amount of current over a long period of time. A deep cycle battery can provide a surge when needed, but nothing like the surge a car battery can. A deep cycle battery is also designed to be deeply discharged over and over again, something that would ruin a car battery very quickly. To

accomplish this, a deep psycle battery uses thicker plates. A car battery typically has two ratings, the cold cranking amps, which are the number of amps that the battery can produce at thirty two degrees fahrenheit for thirty seconds, and the reserve capacity, the number of minutes that the battery can deliver twenty five amps while keeping its voltage above

ten and a half volts. Typically, a deep psychle battery will have two or three times the reserve capacity of a car battery, but will deliver one half the cold cranking apps. In addition, a deep cycle battery can withstand several hundreds total discharge and rescharge cycles, while a car battery is not designed to ever be totally discharged. For more on this and thousands of other topics. Is it

how stuff works? Dot Com? Stuff happens, Just don't let it happen to your photos, music and documents for text, your important files with Mosey by e MC, the most trusted name and cloud backup. Save ten percent today with promo code brain stuff at mosey dot com. That's m o z y dot com.

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