Chosen Solution

I spilt some water which has gone inside the computer. I stupidly tried swithching it on before allowing to dry. It came on shortly and then went off. I have removed the back cover and want to remove the battery as recommended in other solutions. I cannot do this however as I do not have a tri-wing screwdriver. 1 Is it really essential for me to remove the battery? 2 Is there a way to remove the battery without a tri-wing screwdriver?

A screwdriver from Radio Shack is a lot cheaper than a logic board replacement.