Sharp Plug

"Infinite charge... at a cost"
Entity ID	5.100.205
Character Appearance
Item Pool	Battery Bum Shop
Collection Grid	(page 3, column 2, row 1) (page 2, column 2, row 5)

Sharp Plug is a passive item.

Effects

• Damages Isaac in exchange for fully recharging Isaac's current activated item.
  • Sharp Plug costs two hearts of health to use.
    • Sharp Plug's heart cost is one half-heart per charge slot filled. The health cost is not increased in later stages where half-heart damage is upgraded to full heart.
  • If the item has any charges, the Sharp Plug will not work.

Notes

• If Isaac has less than two Black or Soul Hearts, it will remove them but will not remove any Red Hearts.
• Sharp Plug attempts to draw from Red Hearts first.
• Sharp Plug cannot deal fatal damage. If used at one half heart, it will not work.

Synergies

• Damage-triggered items: Each half heart used up by activating Sharp Plug triggers damage effects separately, allowing multiple payouts.
• Keeper: The Keeper takes only one heart of damage.
  • Expends health for charges at the rate of 2 charges per 1 Coin Heart. If an item is 1-charge, removes 1 Coin Heart.
• Glowing Hour Glass: As long as Isaac has more than 2 full hearts or 1.5 hearts, time can be rewinded indefinitely since the health used to recharge the item is refunded upon use.
• Schoolbag: The active item in the main slot is fully charged as normal and the secondary slot gains as many charges as the main one did.
• The Wafer: Reduces the health cost to half a heart (except for Keeper).
• Tainted Magdalene: Tainted Magdalene's Yum Heart can be used infinitely, allowing for infinite invincibility frames from taking damage. Paired with Tainted Magdalene's melee attack, this can easily win a run.

Interactions

• 9 Volt: Renders the Sharp Plug unusable. Sharp Plug can only be used if the item is at 0 charges, but 9 Volt instantly gives 1 charge to the item upon activation.
  • As Sharp Plug can now be used with charges and the cost is based on charges filled, 9 Volt now synergizes with Sharp Plug, lowering the cost of using it by half a heart on 2+ charge items.
• Alabaster Box: Expends up to 6 full hearts if possible with no charges given.
• Eraser: Attempting to recharge the Eraser with the Sharp Plug fails and only hurts Isaac for half a heart.
• Holy Mantle: Holy Mantle blocks the damage from Sharp Plug if the shield is active, but also keeps Isaac's active item from charging.
  • Bypasses the Holy Mantle and gives charges as usual.
• Isaac's Heart: Renders the Sharp Plug unusable.
• The Lost: No benefit from this item unless he has a respawn item because his active item's charge will not refill if the Holy Mantle effect activates. Sharp Plug only activates upon receiving actual damage.
  • No effect, as The Lost doesn't have health.
  • When turned into The Lost via the white fire, activating Sharp Plug will take the health cost from the original character's health. Holy Mantle will not block the health cost.
• Mega Blast: Sharp Plug will not work with Mega Blast.
  • Works as intended, giving 1 charge per half a heart.
• Bethany / Tainted Bethany: Soul/blood charges are used before Sharp Plug when available.

Seeds

PC BKXE 1ZBZ (First floor Shop; The Wafer and A Quarter in an urn in first-floor treasure room)

PS4 D1JR VDCR (First floor Shop; Secret Room with coins is left of spawn; second floor Treasure Room contains The Wafer.)

Active Item Modifiers

Items:

• 4.5 Volt
• 9 Volt
• The Battery
• Book of Virtues
• Car Battery
• Sharp Plug
• Void

Trinkets:

• 'M
• Broken Remote
• Butter!
• Dim Bulb
• Expansion Pack
• Old Capacitor
• Vibrant Bulb

Cards:

• ? Card