Process the oats. Add the rolled oats to a food processor and pulse until they resemble a coarse flour. Avoid processing them completely smooth; a little texture gives the energy balls a better chew.
Warm the peanut butter and honey. Place the peanut butter and honey in a microwave-safe bowl or measuring cup. Microwave for 15–30 seconds, just until slightly warm and easy to stir.
Combine the mixture. Add the peanut butter and honey to a medium bowl with the ground oats, vanilla, chia seeds, chopped raisins, cinnamon, and salt. Stir until a thick, cohesive mixture forms. You can finish mixing with clean hands if it becomes too stiff for a spoon.
Check the consistency. Squeeze a small amount in your palm. It should hold together without crumbling. If the mixture is too sticky to shape, chill it briefly before rolling.
Shape the balls. Divide the mixture evenly into 24 portions. Firmly squeeze each portion to compact it, then roll it between your palms until round.
Serve or chill. Enjoy right away or refrigerate in an airtight container for a firmer texture.