Using these UCO Stakelight Tent Pegs is super easy. First, when you're setting up your tent in the dark, simply drive the stakes into the ground as you would with regular tent pegs. Then, turn on the light using the on - off switch on the lens. You can choose between the area mode for a steady light around your tent for up to 10 hours or the strobe mode for better visibility of your tent's location that lasts up to 24 hours. When it's time to replace the battery, don't worry. Just gently pry off the white lens cap, insert a new AAA battery following the '+' and '-' signs, and pop the lens back into the black casing. To keep your stakes in good shape, after each use, wipe them down with a dry cloth. If they get wet, let them dry thoroughly before storing. Also, when not in use, store them in a cool, dry place to prevent any damage to the LED or the aluminum body.