Check that link, instructions on replacing switch.
In future, removing severly swelled corroded batteries, Drill thru bottom of battery, pry out metal bottom, use spade bit in ratchet and socket to hollow out battery. Thin screw drivers, needle nose pliers to remove case. Do not use vinegar. Solution of baking soda and water, soap and water, and/or, PB Blaster.
[CENTER][FONT=Comic Sans MS]Measure twice, cut once.[/FONT][/CENTER]
[CENTER][FONT=Comic Sans MS]Look at the nail, not the hammer. Watch the fence, not the blade.[/FONT][/CENTER]
[CENTER][FONT=Comic Sans MS]If you hook your thumb over your belt you won't hit it with the hammer or leave it layin on the saw table.[/FONT][/CENTER]