Step 1: Watch Example
Step 2: Watch Back
Step 3: Scissor Tips Match to Notches
DISCLAIMER: Please be aware that scissors are not the correct tool for this task and in any case this procedure would probably invalidate a warranty. Scissors have sharp cutting blades and the potential for bodily harm and/or scratch damage to the case caused by the incorrect use of scissors is higher than if the scissors are used as intended. Please be very careful. You are warned!
Step 4: Rip Curl Watch Internals
Getting to the battery
Having got thus far you don't want to cause damage getting your battery out. I would recommend using a magnifying glass to figure out how the battery is retained before attempting to remove it.
Closing the watch is just a reversal of this instructable. Have fun and be careful.