Hand crank radio cheap motor?

[fleabag]

Why is it that I have to hand crank my hand crank radio for such a long time just to listen to it for such a short time? The battery inside is only 300mah, shouldn't I be able to get 300mah into that battery in at least 1 minute of cranking? I'm pretty sure that the turning of a motor with my arm would output something like 5 or 20w. (When you're on the elliptical, you output during a good workout like 250watts)

 

[Blain]

Originally posted by: fleabag
Why is it that I have to hand crank my hand crank radio for such a long time just to listen to it for such a short time?
The battery inside is only 300mah, shouldn't I be able to get 300mah into that battery in at least 1 minute of cranking?

We're going to need the complete specs of your radio and your average rpm cranking.

 

[corkyg]

And, in addition, the age of the rabio battery. Rechargeable batteries do degrade and wear out over time. BTW, . . . the hand crank turns a generator, not a motor. 🙂

 

[fleabag]

Originally posted by: corkyg
And, in addition, the age of the rabio battery. Rechargeable batteries do degrade and wear out over time. BTW, . . . the hand crank turns a generator, not a motor. 🙂

But a motor can be a generator and from what I know, newer motors of today are far better than those of just 10 years ago.

 

[Blain]

So what's your point? Your crank radio doesn't have a motor. 😕

 

[corkyg]

Motor and generator are made up of same components. When Electric current is passed into the motor, mechanical rotations of the coil results. When the coil in the generator is rotated, Eletric current appears in the coil. So Electric motor is the converse device of generator.

You still have not provided the EEI (Essential Elements of Information.) needed to help you. Lets try again. 🙂

What model and brand?
How old is it?
What kind of storage battery is connected to the hand crank generator?

 

[BladeVenom]

Make yourself a crystal radio, and you won't need a hand crank.