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It's the other way around, the battery powers the flashlight. There's no set answer to that. It depends on the capacity of the battery and the power consumption of the flaslight.
Solar panels do not hold power they convert sunlight to electricity. This is stored in batteries or capacitors. The amount would depend on the rating of the capacitor or battery.
Duracell rechargeable batteries costs on average $16.00-$18.00 for a 4pk AA, 4PK AAA, 2PK C, or a 2PK D. If you purchase Duracell rechargeable batteries in a larger quantity, you are sure to find them for as little as $24.00-$28.00 for an 8pk AA, 8PK AAA, 4PK C or a 4PK D.
None. A generator generates electricity, it does not store it.
1million
The battery stores just so much electricity. The lights use this electricity. Sooner or later the supply is depleted.
A solar cell does not store electricity. It charges a battery that stores electricity. The voltage of a battery can be found by connecting a voltmeter to the battery terminals.
Depends on the amount of cells. That's where we get the word battery from a battery of cells.
That depends on the battery. A car battery makes 12 volts. An AA cell battery makes 1.5 volts.
20000 volts
it depends on the battery voltage
That all depends on the size of the battery. Most batteries sold in supermarkets range from 1.5 to 9 volts.