Binding of Isaac: Rebirth Wiki

Added in Afterbirth †

For all Tech items, check Tech (disambiguation)

Technology Zero is an unlockable passive item added in The Binding of Isaac: Afterbirth † (Booster Pack #2).


  • Connects tears with electricity that damages enemies.
    • Removed in Repentance The electricity's damage is equal to Isaac's Damage.
      • Added in Repentance The electricity deals 30% of Isaac's Damage, 15 times per second.
    • A tear can generate one connection. The tear does not generate another connection even after the connection is lost. However, other tears can still make connections with it.
    • Each of Isaac's tears can connect to other allied tears Including those of shooting familiars.
      • The number of connections is limited by the number of Isaac's tears.


  • It will connect Jacob and Esau Jacob and Esau's tears regardless of which one picked up the item.


  • Anti-Gravity Anti-Gravity: All of the tears fired are connected by electricity, creating a series of electric fences.
  • Apple! Apple! / Tough Love Tough Love: The damage of the electricity can be multiplied by the items. This occurs independently from the tears which generated the electricity.
  • Cricket's Body Cricket's Body / Compound Fracture Compound Fracture / The Parasite The Parasite: Split tears will be connected via electricity.
  • Evil Eye Evil Eye: Tears fired by eye will be connected via electricity to Isaac's tears.
  • Added in RepentanceEye of the Occult Eye of the Occult: Allows you to move the electrified tears, allowing you to hit more enemies and do more damage.
  • Added in RepentanceHaemolacria Haemolacria: Main tears and bursts can be connected via electricity.
  • Pop! Pop!: Tears in midair and tears that knock around each other will still be connected, effectively creating electric barriers.
  • Proptosis Proptosis: Triples the electricity damage. Has no penalty with range.
  • Sinus Infection Sinus Infection: Boogers will have electricity flowing between them even if attached to the same enemy, dealing massive damage to bosses.
  • Sulfuric Acid Sulfuric Acid / Added in RepentanceTerra Terra: The lasers are capable of destroying terrain, but is unable to apply knockback, allowing to easily destroy large quantities of obstacles.
  • Tiny Planet Tiny Planet: Creates moving laser fields that orbit the character.
  • The Wiz The Wiz: The diagonally-spreading tear shots will be connected by electricity, effectively making up for the item's blind spot and providing an attack with a very wide range.


  • The following items override Technology Zero. Tears from other sources such as Lead Pencil Lead Pencil can still generate electricity with each other.
  • Continuum Continuum: Tears will travel through walls; however, the electricity will not connect the tears while they are outside the room. If a tear was connected before it pass through a wall, it will not be connected after passing through, limiting the efficiency of the combination.
  • Flat Stone Flat Stone: Tears lose their connection as they bounce. As such, tears cannot make connection to another tear once they bounce, but other tears can make connection to them.
  • Removed in RepentanceHaemolacria Haemolacria: Only main tears can be connected.

In-game Footage[]



  • Technology Zero is based on this Steam Workshop item by Ashkait and Scayze.
  • Strangely, this item has the tech item tag, and therefore contributes toward its own unlock, though this should be impossible under normal circumstances.