ZZZ Battery Charge Guide: What to Farm First

Spend Battery Charge on the next completed upgrade, then reassess. Agent promotion, a usable W-Engine and the skills your team actually uses usually make a clearer early target than repeatedly chasing disc substats.

Capacity, regeneration and activity costs

Natural regeneration supplies one Battery Charge every six minutes, up to the normal 240 cap: 240 over 24 hours if you leave room for it. Backup Charge accumulates more slowly after the normal pool fills. An Ether Battery restores 60. Source: Battery Charge reference, checked September 20, 2026.

Activity	Normal Battery cost	Farm it for
Combat Simulation	20 per selected card; up to 100 for five	Seals, skill chips, EXP or Dennies
Expert Challenge	40	The selected Agent’s Core Data
Area Patrol (formerly Routine Cleanup)	60	The stage’s Drive Disc sets
Additional Notorious Hunt rewards	60 after the free weekly claims	Needed advanced Core materials

Costs refer to the standard activities, not every event variant. Activity reference. The older reference uses Routine Cleanup; the current name is Area Patrol, a text-only rename documented in the mode’s change history. Check the stage’s current rewards and any bonus before confirming.

Choose coffee to match the plan

At Coff Cafe, Tin Master Special supplies 80 Battery; Espresso supplies 60 plus a doubled Combat Simulation card reward. The latter bonus covers one qualifying card, not an entire five-card batch. Event menus can offer different drinks. Coffee menu reference.

For ordinary Simulation farming, Espresso’s single-card bonus can provide the material value of another 20-Battery card. For Expert Challenge or discs, Tin Master Special gives the extra Battery to allocate directly. Choose after deciding what you need.

A 320-Battery day, worked through

Assume you regenerate 240 during the day and claim the 80-Battery coffee. One possible plan is five Simulation cards (100) + four Expert Challenges (160) + one Area Patrol (60) = 320. You do not need to spend it in that order or wait for the pool to overfill.

This is a budget example, not a recommendation to split every day three ways. If Billy is missing promotion seals, assign more of the budget to those until the promotion is complete. If a Core upgrade is already funded, remove the Expert runs from the plan. Reward quantities depend on challenge tier.

Change priorities as your account develops

Account situation	Next useful target
Story and training still unlocking	Main squad levels, matching W-Engines, essential skills
A promotion cap blocks the attacker	Exact missing seals and Dennies
Reliable team, incomplete Core	Core materials for a defined checkpoint
Working progression and higher reward tiers	Useful disc main stats, then selective substat improvements

Open Source from a missing material to find its unlocked stage. Do not spend Polychrome on refreshes just to finish a cosmetic round number of runs. Claim incoming event materials and check synthesis first, then record the remaining shortage for the next login.