To charge a battery you have to supply energy. But you never get as much energy from the battery as you use to charge it. Why is this?

To charge a battery you have to supply energy. But you never get as mu

1.	To charge a battery you have to supply energy. But you never get as much energy from the battery as you use to charge it. Why is this?
Answer» As you charge the resistance converts some of your charging ENERGY to heat. (NOTE that watts = power = energy/time = Joules/sec). SAY you're charging a 10V battery at a rate of 100 watts (STORED energy per time). For a PERFECT battery that would require you apply 10V at 10 Amps

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To charge a battery you have to supply energy. But you never get as much energy from the battery as you use to charge it. Why is this?​

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To charge a battery you have to supply energy. But you never get as much energy from the battery as you use to charge it. Why is this?