Robustness/Damage resistance of Eneloops?

[Ohmic]

The other night while out on a hike, my clumsy friend dropped one of my AA eneloops onto concrete:mecry:

The end of the can is a little bit squashed and the wrapper is scratched, but as far as I can tell the metal can is not ruptured.

The cell charged fine (same capacity as the others), but I wonder if the cell's life has been cut shorter because of this? Was I lucky in this case that the battery landed on its negative end and not on the positive button end?

What do people think?

 

[VidPro]

there is a small gap at the bottom of the ones i dissasembled, where there is nothing to damage. and a soft insulator down there.
i assume that all exist to reduce the shorting and damage when the base gets jammed in via the nipple of another battery in series.

Guessing
from looking at that (good) picture of it, you just bumped the edge of the rolled up stuff, and smushed it barely, if anything would show from it, it should be reduced self discharge first.

 

[Ohmic]

OK, cool. I guess I use these cells too much to notice and long term self discharge.

Hopefully it is not internally damaged. Does anyone have any pictures of a dissected eneloop so that I can see what the innards of one of these looks like?:thinking:

 

[VidPro]

http://www.candlepowerforums.com/vb/showthread.php?t=180015
this one was from 2006 batch, with white wrapper thing.

many cells of different types , i have dissasembled have the bottom gap, seems to vary when they push capacity, squeeze more in.

 

[Ohmic]

Wow!:thumbsup:

Very nicely put together thread VidPro!

Exactly what I was after.

Thanks again:clap: