un-activated d cells

[hopkins]

I'm thinking that if these types of Code Red D cells have little capacity and a
high internal resistance this sequence will show it up. Although each measurement should only take about 1 sec.

Then a runtime test with a modern flashlight should be done - say a Fenix E01
- run copper wires into the little AAA compartment for instance and let 'er rip...
When it gets dim see if shaking will re-energize it ?

The big question is are they worth buying at all for the power they provide.

Also wonder if they can be opened safely when dead and the electrolyte replaced with something like liquid plumber as a way to recharge them.

 

[MorePower]

Also wonder if they can be opened safely when dead and the electrolyte replaced with something like liquid plumber as a way to recharge them.

Replacing the electrolyte wouldn't help. The zinc in the anode and the manganese dioxide in the cathode are what react during discharge, so once the cell is dead, you end up with zinc oxide and manganese oxide.

 

[hopkins]

Oh. OK. And I'm now thinking the amount of metal in the anode and cathode would be paper thin. Just enough to react with the volume of electrolyte supplied.
I bet these would be the type of trash that needs to go into the special
hazmat bins too.

 

[Turbo DV8]

...once the cell is dead, you end up with zinc oxide and manganese oxide.

Cool, now you have sunscreen...

well...20 years ago the ability to set wet cells into binary components that's stable enough to sustain itself over a span of 20 years could be considered a breakthrough

Understand, but the "Introducing a revolutionary breakthrough in batteries" quote was not from a 20 year old web page!

 

[Illum]

but the "Introducing a revolutionary breakthrough in batteries" quote was not from a 20 year old web page!

in that case its just plain stupid

 

[hopkins]

I wonder if these could be recharged? I understand (vaguely) why alkaline cells
can't be recharged but these twist tops have a liquid inside that probably
would allow easy ion charge transport reversing the discharge chemical
products. Like lead acid batteries do but with different chemicals?

 

[MorePower]

I wonder if these could be recharged? I understand (vaguely) why alkaline cells
can't be recharged but these twist tops have a liquid inside that probably
would allow easy ion charge transport reversing the discharge chemical
products. Like lead acid batteries do but with different chemicals?

Ion transport in standard alkaline cells isn't why there are problems recharging them, it's because of (mainly) zinc dendrite growth that causes internal shorting. Also, deeper discharge (below 1.2V) results in more difficult to reverse discharge products, which in turn makes recharging less effective.

 

[hopkins]

Morepower -you are the man for battery beta! Thanks!
I