themusicgod1's Journal: Homemade Battery a Success!

I just got my voltemeter working, and tested my homemade battery, and sure enough it works!
Homemade Battery
Required: 2 plastic containers(I think I used old honey/margarine containers), 2 empty glass jars(orange juice containers worked), two seperate metals (I used lids from coffee containers(some tin alloy?), and aluminum(?) foil, vinegar/salt+water (vinegar/salt is probably optional, but supposedly helps).
Place the two glass jars in the middle of the two plastic containers, and fill the plastic containers with the vinegar/salt solution. You may need to weigh the glass jars with water so they don't float away. In one end of the container place the first metal, in the other, place the second metal. Do not allow the metals to touch.
Sure enough, I got .2 V. Not much, but I don't think my choice of metals was very good. The point is that there is voltage running.
Now the next question; what can actually use .2 V?