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THEY WILL PROVIDE MORE POWER THAN ALKALINE AA BATTERIES. 2- Slide off battery cover and load two “AA” batteries. Follow the battery polarity as indicated inside the unit. The 2 batteries should be facing opposite directions. 3- Replace the battery cover. 4- Slide the switch down to the ON position. The top will light up blue. You will also see 3 blue lights on the front of the unit (the Power Gauge) indicating the power remaining in the ‘AA’ batteries. (3 lights - FULL, 2 lights HALF, 1 light