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Batteries
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I.F.
electronics forum Guru


Joined: 30 Mar 2006
Posts: 407

PostPosted: Wed Jul 05, 2006 7:37 pm    Post subject: Batteries Reply with quote

Do batteries get heavier as they're charged?
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Sjouke Burry
electronics forum Guru Wannabe


Joined: 29 May 2005
Posts: 190

PostPosted: Wed Jul 05, 2006 10:08 pm    Post subject: Re: Batteries Reply with quote

ian field wrote:
Quote:
Do batteries get heavier as they're charged?


e=m*c*c, so in theory, yes.

I doubt if you can measure it.
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jasen
electronics forum Guru Wannabe


Joined: 18 Jun 2006
Posts: 204

PostPosted: Thu Jul 06, 2006 11:10 am    Post subject: Re: Batteries Reply with quote

On 2006-07-05, ian field <dai.ode@ntlworld.com> wrote:
Quote:
Do batteries get heavier as they're charged?

not measurably. but they must, E=mc^2.

non-sealed lead-acid batteries actually get lighter :)

--

Bye.
Jasen
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I.F.
electronics forum Guru


Joined: 30 Mar 2006
Posts: 407

PostPosted: Thu Jul 06, 2006 5:59 pm    Post subject: Re: Batteries Reply with quote

"Sjouke Burry" <burrynulnulfour@ppllaanneett.nnlll> wrote in message
news:44ac386e$0$2032$ba620dc5@text.nova.planet.nl...
Quote:
ian field wrote:
Do batteries get heavier as they're charged?
e=m*c*c, so in theory, yes.
I doubt if you can measure it.

Any idea what the theoretical math formula looks like! (or is that it?!).
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Bob Myers
electronics forum Guru Wannabe


Joined: 25 Jun 2005
Posts: 171

PostPosted: Thu Jul 06, 2006 6:23 pm    Post subject: Re: Batteries Reply with quote

"ian field" <dai.ode@ntlworld.com> wrote in message
news:4ccrg.30335$OT.28154@newsfe6-win.ntli.net...
Quote:

"Sjouke Burry" <burrynulnulfour@ppllaanneett.nnlll> wrote in message
news:44ac386e$0$2032$ba620dc5@text.nova.planet.nl...
ian field wrote:
Do batteries get heavier as they're charged?
e=m*c*c, so in theory, yes.
I doubt if you can measure it.

Any idea what the theoretical math formula looks like! (or is that it?!).

That's it. The Gospel According to St. Albert (Einstein),
which says that energy is equivalent to mass. If you add
energy to anything, it therefore is effectively gaining mass -
but if you work that formula out with some actual
numbers (and that "c * c" bit is a Really Big Number), it
winds up taking a LOT of energy to equal just a little teeny-
tiny mass. Hence, you are not very likely to be able to
measure the change - we're probably talking (off the top
of my head here) micrograms, if that.

Bob M.
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I.F.
electronics forum Guru


Joined: 30 Mar 2006
Posts: 407

PostPosted: Thu Jul 06, 2006 10:30 pm    Post subject: Re: Batteries Reply with quote

"jasen" <jasen@free.net.nz> wrote in message
news:40bc.44acefa9.ae39f@clunker.homenet...
Quote:
On 2006-07-05, ian field <dai.ode@ntlworld.com> wrote:
Do batteries get heavier as they're charged?

not measurably. but they must, E=mc^2.

non-sealed lead-acid batteries actually get lighter :)

--

Bye.
Jasen

Would that be due to gassing?
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jasen
electronics forum Guru Wannabe


Joined: 18 Jun 2006
Posts: 204

PostPosted: Fri Jul 07, 2006 8:48 am    Post subject: Re: Batteries Reply with quote

On 2006-07-06, ian field <dai.ode@ntlworld.com> wrote:

Quote:
Do batteries get heavier as they're charged?

not measurably. but they must, E=mc^2.

non-sealed lead-acid batteries actually get lighter :)

Would that be due to gassing?

yeah.

Bye.
Jasen
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JANA
electronics forum Guru


Joined: 30 Apr 2005
Posts: 341

PostPosted: Tue Jul 11, 2006 2:27 am    Post subject: Re: Batteries Reply with quote

When charging a battery, you are only transferring electrons from one side
the other. Even if you were able to add electrons to the battery,
considering their extremely small mass, I would doubt you could even weight
a number of megawatts.

--

JANA
_____


"ian field" <dai.ode@ntlworld.com> wrote in message
news:yxUqg.71771$lQ.45956@newsfe3-gui.ntli.net...
Do batteries get heavier as they're charged?
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