a company claims that they came up with a battery that has twice the power as any other one on the market. If u put this new battery in ur old flashlight would your flashlight be brighter? And would u expect it to last longer?
2006-10-15 14:08:21 · 8 answers · asked by Greg P 1 in Science & Mathematics ➔ Physics
There are two separate questions here.
First, assume the battery is a standard D-cell which produces approximately the standard voltage of approximately 1.5 volts. Ignore for the moment that the voltage of nickel-cadmium cells is a little lower, and that of alkaline cells is a little higher. If all the other cells on the market can source about an ampere of current under reasonable conditions, then the new battery could source about two amperes under comparable conditions. Of course, these conditions would differ because the load resistance would be about half. Similar conditions could include things like limiting the source voltage drop to about half a volt, and requiring that the current be provided for at least two continuous hours.
The other question is what the company really means by their claim. Perhaps it's the above. Perhaps it's just that it would last twice as long in the same flashlight.
It's unlikely that the flashlight would be brighter. That would require a higher voltage, which would violate the standard of the cell type. People wouldn't buy it because it would damage, or at least reduce the lifetime of, the appliance.
2006-10-15 19:55:34 · answer #1 · answered by Frank N 7 · 0⤊ 0⤋
When companies make these claims "Twice as much power" means it lasts longer NOT that it pushes more juice. All flash.ight batters push 1.5 volts and that is the voltage that the flashlights are designed for.
2006-10-15 14:18:47 · answer #2 · answered by Scott L 5 · 0⤊ 1⤋
No. Power is how many watts it can put out. How long it lasts would be how long it could put out that many watts. Bulb brightness would be proportional to how many volts the battery puts out.
Advertising isn't science. The company could have bee misusing the term "power" to describe capacity (how long the batter lasts).
2006-10-16 03:07:47 · answer #3 · answered by Nomadd 7 · 0⤊ 0⤋
At twice the power (power equals the voltage times the amperage), I would expect the bulb to be very bright if the voltage is doubled - unfortunately, I would also expect the bulb will burn out, in a very short time.
If by "twice the power" you are referring to the amperage capacity (doubled) at the same voltage, the bulb would be the same brightness but for a much longer time.
2006-10-15 14:22:09 · answer #4 · answered by LeAnne 7 · 1⤊ 2⤋
Just because a battery can produce more power for a period of time, this does not mean that it is overall superior; for example, the battery may not function very well when it is partially drained.
2006-10-15 14:12:48 · answer #5 · answered by bruinfan 7 · 0⤊ 1⤋
They probably mean it lasts twice as long, in which case the light wouldn't be any brighter and its lifetime would be the same.
2006-10-15 14:51:57 · answer #6 · answered by zee_prime 6 · 0⤊ 1⤋
High Performance Tactical Flashlight : http://FlashLight.uzaev.com/?gsRI
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2016-10-16 05:06:34 · answer #8 · answered by hoch 4 · 0⤊ 0⤋