The Repulsor Gear requires four AA 1.5 V Alkaline batteries. Use a Philips cross-head screwdriver to install them.
The battery compartment for your Repulsor Gear is located on the opposite end of the Palm Cannon above the gold ratchet dial.
Turn your Phillips screwdriver to the left to loosen the screws and remove the battery plate, and then insert four batteries into your Repulsor Gear, making sure the positive and negative ends are facing in the correct direction as indicated in the battery compartment. Once the batteries are installed, put the battery plate back in place and secure the screws by turning the screwdriver to the right.
Your Repulsor Gear may stop working before the batteries are completely dead. Always have a spare set of batteries ready in case of emergency. A good recruit is always prepared for any eventuality in battle.
As well, if you use disposable batteries and they no longer power the Repulsor, don't throw them away! Try them in a different household device – they may have some power left!
The Avengers Labs recommends that you ask an adult for help when removing and installing batteries.