On 4/1/2014 7:18 AM, Moe DeLoughan wrote:
On 3/31/2014 11:19 PM, H oM eG uy wrote:
Art Todesco wrote:

I just saw this ad: http://www.dailysteals.com/#d/21800 Anyone
know it they work and how much energy you get after a charge,
compared to a new cell?

http://www.allaboutbatteries.com/Alkaline-charging.html


That's just a sales pitch from a company peddling its charger.

Then there's this:

""The alkaline batteries (which are generally based on the conversion
of MnO2 and Zn to Mn3O4 and ZnO) offer an excellent example of this
last point. Although the chemical changes at the electrodes can be
reversed, until recently alkaline batteries were manufactured only to
function as primary cells. Recharging one of these primary cells
could allow the battery to be reused, but the possible number of
recharging cycles for such a cell is very limited--it performs more
poorly with each recharge. More important, recharging an
old-fashioned alkaline battery is not safe. During or after a
recharge, the battery might generate enough hydrogen gas to cause an
explosion. In their rechargeable form, alkaline cells have undergone
several changes. They have been redesigned to allow for a more
efficient reverse reaction, they contain a catalyst to minimize
hydrogen formation and they have safety vents that prevent the
buildup of excess pressure during recharging."
http://www.scientificamerican.com/ar...argeable-that/

That's good information, it's just at least 15 years out of date and
alkaline batteries have changed since then. Not in their basic form but
in many subtle ways to improve their performance. ^_^

TDD