DIY: EXTREME Power saving wireless mouse mod

Step 2 Open up the specimen

Only two screws held the casing together and neither were under any sticker or other adhesive cover. 4 more screws were removed to separate the inside boards so I could get to the pcb mounted negative battery spring connector and remove it. Then I soldered two thin wire leads onto the switch's solder points, and soldered the end of one of those wires to a new negative battery terminal tab from a salvaged AAA battery box.