Issue dossier
The maker reports that the original coin-cell setup could brown out after roughly two minutes, then says more than 200 already programmed badges were reprogrammed before distribution and informally appeared to have substantially improved battery life. The source does not provide a controlled test, exact firmware change, affected-unit count, serial/revision mapping, battery characterization, follow-up failure rate, or confirmation that every distributed unit received the repair.
A linkable camp-impact record with badge context, severity, evidence confidence, and source notes.
Back to issues index
coin-cell brownout and field-repair history · first-person maker account · maker-reported repair applied; affected scope and final validation unverified
The record keeps an attributable production/reliability history visible without offering repair instructions, declaring the hardware safe, or generalizing a maker observation into a verified universal outcome.
- Badge
- Greycademy 2026 Hackbadge
- Category
- coin-cell brownout and field-repair history
- Severity
- warning
- Confidence
- first-person maker account
- Status
- maker-reported repair applied; affected scope and final validation unverified
- Timeframe
- immediately before Greycademy 2026 distribution
- Source note
- Terence Chan Zun Mun's public Greycademy Hackbadge account.
first-person maker record
Public first-person account naming the intended Greycademy participant distribution, CH32V003 and coin-cell basis, maker artwork, Howard Ong PCB design, and reprogramming of more than 200 prepared badges after a power-reliability problem. It is not a source-code or image-reuse grant.
Badge: Greycademy 2026 Hackbadge
maker project index
Public maker index marking Hackbadge for Greycademy 2026 as deployed electronics hardware, alongside separately named NUS Greyhats badge projects.
Badge: Greycademy 2026 Hackbadge
maker project page
Hackin7's dated public project page naming a deployed electronics, hardware, badge, and PCB Hackbadge created for Greycademy 2026.
Badge: Greycademy 2026 Hackbadge
official event announcement
Official NUS Greyhats announcement for A.YCEP × Greycademy 2026. It schedules January 24-25 workshops, January 26-30 practice, and January 31 / February 7 qualification and finals, and says participants can take home electronic badges among free goodies.
Badge: Greycademy 2026 Hackbadge
official event recap
Post-event NUS Greyhats account of the completed program, collaboration with CSA's A.YCEP, two days of training, CTF work, 78 challenges, 60 finalists, and 3,526 captured flags. It does not document a specific badge unit or distribution ledger.
Badge: Greycademy 2026 Hackbadge
Hackin7 · retrieved 2026-05-15
Primary maker project page, dated January 24, 2026, that identifies the deployed electronic PCB badge as created for Greycademy 2026.
Badge: Greycademy 2026 Hackbadge
NUS Greyhats · retrieved 2026-05-15
Primary organizer post-event source establishing that the A.YCEP × Greycademy 2026 program was completed, ran with CSA support, and included training plus qualifier/final CTF work.
Badge: Greycademy 2026 Hackbadge
NUS Greyhats Official Announcements · retrieved 2026-05-15
Primary organizer announcement for the 2026 Singapore tertiary-student cybersecurity program, schedule, workshop/CTF format, and participant electronic-badge take-home wording. It does not prove an individual recipient, hardware specification, or completed distribution.
Badge: Greycademy 2026 Hackbadge
Terence Chan Zun Mun / Hackin7 · retrieved 2026-05-15
Primary maker account identifying the CH32V003, coin-cell basis, intended participant distribution, artwork and PCB-design attribution, brownout problem, and reprogramming of more than 200 already prepared badges. No firmware archive, exact change, final release, or image-reuse licence is published there.
Badge: Greycademy 2026 Hackbadge