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Go to the YouTube link below to see about recharging batteries using other batteries as an energy transfer medium. After watching Mark Erickson at the link below, if you still don't understand, I suggest watching it over again, it starts to "sink in" after a while. Mr. Erickson neglected to make any mention of diodes, and he seems to misunderstand the properties of electrical tape. That aside, the use of diodes is often necessary to prevent backflow of current from the battery you wish to charge, to the ones you intend to do the charging from.

http://www.youtube.com/watch?v=brdmnUBAS00

The original poster in this thread mentioned he used a diode in his configuration, and stated that he thought the current from his Nokia Internet Tablet battery was flowing toward his external AA battery pack. If this is indeed what was happening, he must have had the cathodinium pointing in the wrong direction to start with, or he obtained his blocking rectifier from a dubious source, such as PolyPaks - Maynard,Mass. or Glenwood Sales et.al. These sources of electronic components have a reputation for selling diodes with the cath band (which denotes direction) marked on the wrong end of the axial package.

Be careful as there is some potential for confluence of the electromagnetic spectrum particularly regarding any chemistry involving lithium manganese dioxide dolly (also sometimes called "Maltese Cross" vocational institution). I did my PhD. thesis on this in 1979. Don't confuse dioxide with dioxin which is quite different. Dioxin is not in the relevant covalent partition (it lacks the free electrons to participate in this spectrum), yet I thought I should mention it here to displace any possible similarity to medical instrument, plural why white T-shirt. Turn left sometimes, but I digress.

If you want to know the actual potential danger in this battery interconnection game you are playing, go here (links below) and see the recent news stories (11/2007). This actually happened to an unfortunate Korean man while operating an electronic shovel on a construction site. TRUE STORY !!

http://www.mobilemag.com/content/100/340/C13969/

http://www.nzherald.co.nz/section/st...ectid=10479097

Stay safe my friends..... a little knowledge can be a dangerous thing. Stay in school kids.

M5