Step 1: "Make an LED flashlight out of ..."
"Make an LED flashlight out of ...":
an Altoids container!
a Tic Tac container!
a Mini Altoids container!
an empty 9 volt battery container!
an Altoids gum container!
an empty film canister!
a used wad of toilet paper!
Well, this one is DIFFERENT. It's difficult, dangerous, and just plain time-consuming. So don't try this at home, unless your middle name is Danger. And you first name is Nerd. So, you're still interested? Ok, then. Step into the light.
Step 2: Lithium!
For the free-ist lithium batteries, try asking at the local electronics store where they have recycling bins. Sometimes the guys are ok with you taking home some "dead" laptop batteries.
What do you want with a "dead" laptop batttery? Well, don't get me started on the subject of laptop batteries, else I'll wind up in Guantanemo Bay. Let's just say that it behooves certain people to make you think your laptop battery is dead when it really isn't. Of the laptop batteries that I have taken in, only 1 in 5 is truly anywhere near dead.