Battle Keys are the primary objective of Battle Force 5. They are found in all the Battle Zones and contain a magnetic polarity that will allow them to attach to the car that reaches it first. Once they are obtained, the owner of the key can re-open the portal to the zone and open portals to other worlds from within the zone whenever they please. In order to close a portal to a Battle Zone, simply reach for the Battle Key and it will come to you. Both Rawkus and the Sentients have the ability to modify Battle Keys to reach different locations in the Multiverse. BattleKeys are made by Hadron Crystals, as seen in Axis of Evil, Part 2.
Lava Battlezone Key location: Unknown
Alien City Battlezone Key location: Unsure
Clockwork Battlezone Key location: Always on a gear
Biomech Battlezone Key location: on the heart