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Borderlands 4 Guide

How to Unlock The Legendary Ultracapacitor Harlowe Mod

Class Mods
Legendary Loot
By Lewis0n
Updated on Sep 11, 2026
Sep 11, 2026

Overview

Ultracapacior is Harlowe Class Mod.

Kill Skill. Whenever Harlowe kills an enemy, she gains a Stack of Ultracapacitor up to 25 Stacks.

Harlowe gains +10% Skill Damage Multiplier for every Stack of Ultracapacitor. Whenever her Action Skill enters Cooldown, she loses all Stacks of Ultracapacitor.

How To Unlock

Unlock Location:

  • Progress through the (FL4K And The Last Resort) DLC until reaching the Boss
    Any Boss

Farm Method:

  • Defeat Any Boss to get a chance at the Ultracapacitor.
  • After use the Encore Machine nearby to reset the fight.
  • Repeatedly defeat Any Boss until the Ultracapacitor drops.

Comments

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Table of Contents

1. Overview2. How To Unlock3. Comments

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