Demara Battery Mark II

Max-level stats (Lv60)

ATK (Lv.60)

624

Impact (Lv.60)

15%

Rank

A

W-Engine effect

Rank AStun

In a Flash of Light

Increases Electric DMG by 15%. When the equipper hits an enemy with Dodge Counter or Assist Attack, their Energy Generation Rate increases by 18% for 8s. *Stats shown are at Base level.

Overclock Table (★1 → ★5)

Official values straight from the publisher — every duplicate copy Overclocks the passive by one star, capped at ★5.

Upgrade	★☆☆☆☆	★★☆☆☆	★★★☆☆	★★★★☆	★★★★★
Electric DMG Increase	15%	17.5%	20%	22%	24%
Dodge Counter/ Assist Attack Energy Generation Rate Increase	18%	20.5%	23%	25%	27.5%

Materials & Stats per Breakthrough Milestone (0 → 60)

The full ATK/sub-stat curve across all 7 milestones plus the materials each one costs, read straight from official data.

Lv.	Before	After	Material
Lv.0	ATK: - Impact: -	ATK: 42 Impact: 6%
Lv.10	ATK: 107 Impact: 6%	ATK: 145 Impact: 7.8%	Denny ×9,600 Stun Component ×3
Lv.20	ATK: 211 Impact: 7.8%	ATK: 248 Impact: 9.6%	Denny ×22,400 Reinforced Stun Component ×10
Lv.30	ATK: 314 Impact: 9.6%	ATK: 352 Impact: 11.4%	Denny ×48,000 Reinforced Stun Component ×16
Lv.40	ATK: 417 Impact: 11.4%	ATK: 455 Impact: 13.2%	Denny ×80,000 Specialized Stun Component ×8
Lv.50	ATK: 521 Impact: 13.2%	ATK: 558 Impact: 15%	Denny ×160,000 Specialized Stun Component ×16
Lv.60	ATK: - Impact: -	ATK: 624 Impact: 15%

Total materials for the full 0→60 climb

Denny ×320,000 Stun Component ×3 Reinforced Stun Component ×26 Specialized Stun Component ×24

Where To Farm

Combat Simulation — each Enemy Card costs 20 Battery, up to 5 cards per run (100 Battery for a full run).

Signature Holder

Demara Battery Mark II's exclusive signal W-Engine — equip it on the matching Agent to unlock the signature outfit.

Anby Demara

Best Agents for this W-Engine

Recommended for

A

Anby B

S

Norma S+

How to Get This W-Engine

Pull it from Signal Search using Master Tapes / Encrypted Master Tapes (bought with Polychrome) — S-rank W-Engines get their own banner, usually alongside the matching character's banner.

Trade for it at the Gadget Shop's Box Galaxy section (Sixth Street): costs W-Engine Components + W-Engine Chips + Denny; Chips come from disassembling spare W-Engines.

A handful of A/B-rank W-Engines unlock through Proxy Primer trials or as story/event rewards instead of the gacha — not every W-Engine is pullable.

Compare with Same-Specialty Picks

Other Stun-specialty W-Engines, sorted by rank — solid stand-ins while you don't have the signature.

W-Engines	Rank	Base ATK (Lv.60)
Demara Battery Mark II	A	624
Chief Sidekick	S	713
Neon Fantasies	S	713
Yesterday Calls	S	713
Roaring Fur-nace	S	713
Spectral Gaze	S	713
Ice-Jade Teapot	S	713

Official Artwork / Lore

This customized W-Engine Core focuses on power storage and has been modified to enhance power storage functions. It can be effectively boost Zap damage output for weapons, and is the gadget store owner's piece de resistance. Not long after, Anby made some tweaks based on user habits, but judging by how serious and careful she while conducting each maintenance session, these are probably not the safest of modifications. "Weapons SHOULD be dangerous. If it can't shock me, then how is it going to shock the enemy?" — Anby's response while carefully performing maintenance

Alternatives of the same specialty

Stun specialty — decent picks while you don't have this one

Chief Sidekick

Neon Fantasies

Yesterday Calls

Roaring Fur-nace

Spectral Gaze

How to read this W-Engine page

Every W-Engine has 5 Refinement ranks (R1→R5): refinement ONLY strengthens the passive effect — the numbers in the table above run from left (R1, unrefined) to right (R5, max refinement via 4 duplicates or Overclock materials); Base ATK and the Advanced Stat (CRIT Rate/CRIT DMG/ATK%/PEN Ratio/Anomaly Proficiency...) do NOT change with refinement, only with the engine's level. "Best Agents for this W-Engine" prioritizes agents whose real build actually recommends this engine; if that data isn't available yet, the page falls back to agents sharing the same specialty as a rough guide. "Alternatives of the same specialty" lists other W-Engines with the same role — useful when you don't own the engine shown on this page.

FAQ

What is Demara Battery Mark II in Zenless Zone Zero?

Demara Battery Mark II is a rank A W-Engine built for the Stun specialty in Zenless Zone Zero — equip it on an Agent of the matching specialty to unlock the full passive effect; see the base stats and the full R1→R5 Refinement table in the sections above.

Which Agents should use Demara Battery Mark II?

Demara Battery Mark II fits Stun specialty Agents best, with 2 recommended characters including Anby, Norma — see the full list with portraits in the "Best Agents for this W-Engine" section above.

How much Denny and material does it take to upgrade Demara Battery Mark II, and where do I farm it?

Leveling Demara Battery Mark II through every milestone takes roughly 4 W-Engine components and Denny ×320,000, Stun Component ×3, Reinforced Stun Component ×26 Denny combined — the components drop from Combat Simulation; see the exact breakdown per milestone and the Battery cost in the "How Much You Need" and "Where to Farm" sections above.

Is Overclocking Demara Battery Mark II worth it?

Overclocking only strengthens Demara Battery Mark II's passive effect from ★1 up to ★5 (5 copies) — it never changes Base ATK or the sub-stat, so getting the base copy matters far more; treat extra copies as a bonus.

Where do I get Demara Battery Mark II?

Mostly through Signal Search gacha (Polychrome); a few A/B-rank W-Engines are tradeable at the Gadget Shop's Box Galaxy or come from story/event rewards — see the "How to Get" section above for details.