The Tesla Barrier was upgraded version of the Shield Charger, a protective weapon manufactured by MegaCorp. It offered more protection than the Shield Charger both lasting longer after activation and also having a higher voltage electrostatic component, allowing arcs of electricity to shock nearby enemies. These shocks used the shield's power, depleting it more quickly.
Notes and references
|Weapons and gadgets in Ratchet & Clank: Up Your Arsenal|