Lime Battery

One lime=0.95 volts
Two limes=1.96 volts
three limes=2.9 volts and lit up a LED
HOW DID WE DO IT?
We put a piece of copper and a nail into a lime and connected it to a volt meter. this made electricity.
QUESTION
will it improve the effect if you put more wires/nails in?
yes! if you were to put in three nails and three copper you get three times as much electricity

lemon battery 

tec

The get ready get thru website tells us that we need a torch & spare batteries for our SURVIVAL KIT CONCEPTUAL STATEMENT: I am going to design & make a portable torch for my SURVIVAL KIT