That's not a very accurate description of the chemical reactions that are involved in the charging of a battery :)
That's more of how a capacitor works, and even then it's a bit on the overly simple side. (In a side note, there's been a few articles about ultracapitors lately, like this one --
If they can ever make this work, we may be able to replace our batteries with capacitors. Alas, this is many many years away.)
| A 3-cell 1.6 amp-hour Li-Po pack weighs 120 grams |
So you see a change of 6 parts per | trillion.
Larger than I would have thought. But I didn't bother to do the math, so ...
| This is, perhaps, something that you could measure one day if | you were feeling puckish and worked at a major metrology lab, but the | change in mass from the connector wear would probably be far greater | than the change in mass from the charge.
I was thinking more of any outgassing that happens during each charge or discharge being a larger factor, but there is that too.
| So a charged battery _does_ have a different weight than a discharged | one, but only if you're a smart ass.
Oh, the mass change has nothing to do with me being or not being a smart ass :)
In any event, I wasn't really trying to be a smart ass -- I was just going with what Ken started --
| >>In article , | >>Ken Cashion wrote: | >>
| >>| I wonder...if my battery is a little off the CG, should I | >>| check the CG with the battery charged or discharged? | >>| Like if ahead of the CG, check the CG with the battery | >>| discharged, and if behind the CG, check it with the battery charged?
... and I'm sure he knew the answer to his question already :)
And I did quantify the sort of difference that charging a battery might make in your CoG --
| >>If you don't heed my warning, your CoG might very well end up an | >>angstrom or so off ...
(I originally was thinking of a micron, but it seemed too large. But if the difference really is 6 parts in a trillion, perhaps microns would be a good deal closer.)