World Energy Chip

The World Energy Chip "itemizes the world's energy supplies". As it retains information when unplugged, presumably it is some sort of solid state technology. It is normally integrated into Teletraan I and also somehow controls the power supply to Autobot headquarters.

The Transformers cartoon
Megatron stole the human-built robot Nightbird and assigned her the mission of infiltrating Autobot HQ and stealing the World Energy Chip. She was able to sneak into the base and unplug the chip; however, this action plunged the base into darkness, alerting the Autobots. It wasn't until after Optimus Prime had led a team in pursuit that Ratchet and Ironhide discovered that the chip was missing.

Although hampered by their promise not to harm Nightbird, the Autobots managed to capture the robot and Optimus retrieved the World Energy Chip… only to drop it again when the Decepticons attacked. Bombshell snatched it up just as Cliffjumper was reaching for it, but Brawn fired on the Insecticon, allowing Optimus to regain the chip once more.

After the fight was over, the chip was presumably installed back into Teletraan I.

Transformers Legends
Nightbird stole the World Energy Chip from Autobot HQ under very similar circumstances.