Do full batteries weigh more?

[aphex]

?

 

[Tu13erhead]

No.

 

[swtethan]

empty battery as in no acid?

 

[JDrake]

A tad

 

[MaxFusion16]

no, the electrons just move around, they don't disappear.

 

[imported_LoKe]

Depends if a charge has weight or not.

 

[Spooner]

haha... very interesting question

 

[Heisenberg]

In terms of anything you could practically measure, no.

 

[iamaelephant]

e=mc^2. They weight marginally more.

 

[PHiuR]

yes

 

[FelixDeCat]

I cant stand heavy batteries, they are so hard to change. The one in my Mercedes was 75lbs!!!!!! :|

 

[Cattlegod]

Originally posted by: Falcon39
e=mc^2. They weight marginally more.

bhaha

are you in the nuclear battery business?

 

[Howard]

The increase in mass is negligible, but there is an increase (assuming a perfectly closed system).

 

[Eli]

Technically, they should, yes.

 

[Goosemaster]

the contents of your wallet definteily do...

 

[Heisenberg]

Originally posted by: Cattlegod

Originally posted by: Falcon39
e=mc^2. They weight marginally more.

bhaha

are you in the nuclear battery business?

It's one of the new Duracell cold fusion batteries. They last a long time as long as you don't mind not having kids.

Seriously, mass is obviously not created or destroyed inside a battery. The chemical bonds rearrange themselves to a lower energy state and the difference in energy is what you use to power things. The question is whether the stored potential energy corresponds to an increase in mass, and that's a pretty complicated issue.

 

[iamaelephant]

Originally posted by: Cattlegod

Originally posted by: Falcon39
e=mc^2. They weight marginally more.

bhaha

are you in the nuclear battery business?

Doesn't need to be nuclear. Adding energy to a system increases it's mass.

 

[Peetoeng]

If my calculation was correct, for a battery with a power rating of 100 amp-hr, the electrons would weigh about 2 ug (micrograms)

 

[DaiShan]

Conservation of mass my friend

 

[Eli]

Originally posted by: Peetoeng
If my calculation was correct, for a battery with a power rating of 100 amp-hr, the electrons would weigh about 2 ug (micrograms)

Nice.

The 115Ah deep cycle marine battery that I got weighs about 65lbs..

So it's like 0.000000000000000000001% of the total weight.

 

[EGGO]

You'll feel it. Combined with the weight of 60GB of data, my iPod is hell to carry on a full charge.

 

[cyclohexane]

No.

 

[DevilsAdvocate]

Originally posted by: Howard
The increase in mass is negligible, but there is an increase (assuming a perfectly closed system).

 

[myusername]

Has someone got some spare AA batteries and a concrete floor? Someone once told me that a charged battery bounces, but a dead one does not. It seems ridiculous on the face of it, and the bouncing probably damages the lifespan of the good battery. However, a 2 minute google search did not enlighten me (though this lore that I would have expected to be widespread - false or not) and I would be interested in a practical test if someone feels inclined.

 

[deftron]

21 grams more