Posts Tagged ‘Battery

21
Jun
09

What is the difference between AA and AAA batteries?

Being an engineer myself, I know this is probably very common knowledge, but to the few who might not know and would be interested to know, here is what wiki has to say.

AAA batteries are commonly used in small electronic devices, such as TV remote controls, MP3-players and digital cameras. Devices that require the same voltage, but have a higher current draw, are often designed to use larger batteries such as the AA battery type. AA batteries have about three times the capacity of AAA batteries. However, with the increasing efficiency and miniaturization of modern electronics, many devices which previously were designed for AA batteries—remote controls, computer mice, and keyboards—are being replaced by models that accept AAA cells.

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05
Jun
09

Does a charged battery weigh more than a discharged one?

Ok the reason I pose this, Energy and Mass are related to each other (Bhai Einstein ne bola tha)… and when the battery discharges, its technically lost energy and hence should have lost mass. But have a feeling the mass lost is really negligible and hence we dont record that loss. Lemme figure it out.

I got hands to an interesting forum with some comments on a similar question posed.

Something interesting is, that if you drop a battery (with a full charge) from about 6 to 10 inches onto a concrete floor, it will bounce much less (almost seem to stick to the floor) than an empty one, which bounces quite high comparitivly. Not saying this has to do with the weight of the battery, but maybe someone could offer an explanation?
Energy is stored in a battery in chemical form. In other words, the energy is stored in the chemical bonds between atoms, which involve electrons. A charged battery has many such bonds already formed, while a discharged battery contains the same atoms, but with the bonds almost all broken.
I guess that’s the most apt answer… Breaking bonds, energy released.




So what’s this blog about?

Another attempt? Well yes. Attempting to figure out another sustainable model (there are some other attempts going on parallel-ly). Well, we have a lot of questions in mind. we read up stuff, we do some research to find answers to these questions. This is an attempt to publish that little 15-20 minute research.
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