NULL USB Data Blocker
NULL USB Data Blocker
NULL USB Data Blocker
NULL USB Data Blocker

NULL USB Data Blocker

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12€
(27 reviews)

DATA PROTECTION · DROP 001 · COMUN

Charge anywhere. Let nothing talk to your phone.

A USB-C data blocker that passes power and cuts data — so a public port can charge your device but can’t read or inject anything. A built-in fast-charging smart chip keeps high-speed charging while the data line stays dead.

Specs

  • Fast chargeZero data syncbuilt-in smart chip · USB-C
  • Fast charge + zero data
  • Built-in smart chip
  • Metal housing
  • USB-C, plug and play
DEFEATSJuice-jackingdata theft via USBmalware injection
Honest: at an untrusted port — airport, café, public charger — it lets power through and blocks data, so the port can’t read your device or push anything onto it. The smart chip keeps fast charging. It guards the USB-C data line only — not wireless, and not the ports you already trust at home.
33 mmWeightUSB-CFitsDrop 001Drop
Verified before shippingDiscreet packagingShips worldwide
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Estimated Delivery:
03 - 08 Aug, 2026
CMN-D1-09-DAT
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Specs

Specs

Specifications

TypeUSB-C data blocker (data lines cut)
ChargingFast charge via built-in smart chip
Charge range5–50 V / 1–5 A
ConnectorsUSB-C in · USB-C out
MaterialMetal housing
Size33 × 12.2 mm (1.3 × 0.48")
SetupPlug and play — nothing to install
Good to know

  • Blocks data, keeps fast charging
  • For untrusted public USB-C ports
  • USB-C to USB-C — check your cable/charger match
  • Guards the USB data line, not wireless

Field Questions

Field Questions

Field questions

Will it slow my charging?
No — that's the upgrade. A built-in fast-charging smart chip negotiates high-speed charging even with the data line cut, so you keep your charge speed and still block data.
What does it actually stop?
Data over the USB-C cable. At a tampered public port your device can draw power but can't sync, pair, transfer files or take an injected payload — that's the juice-jacking attack, blocked.
Is it USB-C or USB-A?
USB-C to USB-C. It sits inline on a USB-C cable, so check that your cable and charger are USB-C before you rely on it.
Do I need it with my own charger?
Not really — it's for untrusted ports. Your own wall charger at home is already safe. Carry it for airports, cafés, hotels, rental cars and public charging walls.
What's it made of?
A solid metal housing about 33 mm long — pocket- or keyring-size, plug-and-play, nothing to install.

Transparency

Transparency

Honest about thisIt does one thing well: at an untrusted USB-C port — airport, café, public charger — it lets power through and blocks data, so the port can't read your device or push anything onto it. The built-in smart chip means you keep fast charging instead of trading speed for safety.

It guards the USB-C data line, nothing more — not wireless attacks, and not the ports you already trust at home. It's USB-C to USB-C, so make sure your cable and charger match.

About the brand

More Products

Comun

People’s Defense Initiative
NULL USB Data Blocker

NULL USB Data Blocker

12€
Add to Cart

Product Details

THE PIECE · USB-C DATA BLOCKER

Charge anywhere. Let nothing talk to your phone.

NULL is a USB-C data blocker — it sits between your cable and a charging port and physically stops data, so a public USB port can push power but can't read, sync or inject anything. The difference here: a built-in fast-charging smart chip means you keep high-speed charging while the data line stays dead. Metal-bodied, plug-and-play, pocket-size. Airport, café, rental car, public charging wall — power up without trusting the port.

What it defeats
DEFEATS
Juice-jacking

Blocks the USB-C data line, so a tampered public port can charge your device but can't talk to it.

DEFEATS
Silent data sync

No handshake, no file access, no pairing — power passes, data doesn't.

DEFEATS
The slow-charge trade-off

A built-in smart chip keeps fast charging — you don't give up speed for safety.

DEFEATS
Sketchy public ports

Airport, café, hotel, rental car — use any port without trusting it.

Power passes. Data stops at the wall.

Data blocked, fast charge intact.

HOW IT WORKS

Power passes. Data stops at the wall.

Plug it inline on a USB-C cable and it lets power through while cutting the data path — so a charging port can't sync, read or inject anything into your device. No pairing prompt, no file transfer, no malware handshake.

The difference from a basic blocker: a built-in fast-charging smart chip negotiates high-speed charging on its own, so the dead data line doesn't slow you down.

THE BUILD

Metal, pocket-size, plug-and-play.

A solid metal housing, about 33 mm long — small enough to live on a keyring or in a pocket. USB-C in, USB-C out, plug-and-play with most USB-C gear; nothing to install, nothing to configure.

Supports a wide 5–50 V / 1–5 A charge range, so it keeps up with fast chargers.

Metal, pocket-size, plug-and-play.

Metal body, USB-C, ~33 mm.

Rating & Review

Based on 27 Reviews
Write a review
  1. keon
    (verified owner)

    small, metal, blocks data for real (tested). charges my devices fine. permanent keychain resident now. cheap and genuinely useful for anyone who travels

  2. Marcus B.
    (verified owner)

    Works as described, confirmed no data path. Reasonable build. Just be aware these by design won’t do fast charging (no data negotiation), so it’s for topping up, not a 0-100 in 30 mins situation. For travel safety it’s exactly the tool.

  3. Hugo M.
    (verified owner)

    Compact, métallique, fiable. Testé et approuvé : données coupées, charge maintenue. Parfait pour les bornes d’aéroport. Il ne prend pas de place sur le porte-clés et fait exactement ce qu’il promet. Je recommande.

  4. grayson_k
    (verified owner)

    works, blocks data (tested), charges fine for a trickle. just know it won’t fast charge since there’s no data handshake — that’s how these work, not a fault. good travel piece

  5. Camille D.
    (verified owner)

    Fonctionne comme annoncé, données bloquées (testé). La charge est plus lente qu’en direct, normal pour ce type d’adaptateur. Bonne fabrication, format porte-clés. Parfait pour voyager l’esprit tranquille. Une étoile en moins pour l’anneau un peu petit.

  6. spectre
    (verified owner)

    category-credibility piece and it earns it. D+/D- not connected, confirmed. metal housing, keychain hole, doesn’t wobble in the port. carry it everywhere i charge in public

  7. Sophie F.
    (verified owner)

    Got it for travelling and tested it works (data blocked, power flows) with help from a friend’s USB meter. Build is solid. Charging is slower than direct but that’s the point of it. Small and reassuring to have. Would buy again.

  8. Dave K.
    (verified owner)

    Does what it claims — verified power-only with a meter. Charging speed through it is a touch slower than direct (no fast-charge negotiation on my device), which is expected for a data blocker. For airports and conference charging stations it’s exactly right. Small, sturdy, keyring-friendly.

  9. nullzero
    (verified owner)

    the data pins are physically absent, not just “disabled in firmware” — which is exactly what you want from one of these. metal build, keychain ready. charges fine. trustworthy little thing

  10. Lucas D.
    (verified owner)

    Petit, robuste, efficace. Testé : le courant passe, les données non. Je le branche sur toute prise USB publique avant mon câble, et je charge sans crainte. Le boîtier est en métal, ça inspire confiance. Excellent accessoire de voyage.

  11. edc_tom
    (verified owner)

    Put a USB power/data meter on it before trusting it. Power rails live, D+ and D- dead — so it’s a genuine data block, not theatre. Passed ~2A to my phone no problem, so it doesn’t choke charging speed either. Machined-ish housing, keychain hole, lives on my keys for airport/hotel charging. This is the real one.

  12. Théo B.
    (verified owner)

    Vérifié au testeur, il bloque bien les données et laisse passer le courant. Solide, compact, sur mon porte-clés en permanence. Je charge sur n’importe quelle prise publique sans plus me poser de question. Top.

  13. tobias
    (verified owner)

    does the job, tested and confirmed. slower charge through it but that’s the tradeoff for blocking data. solid build. good for anyone who charges in airports or hotels

  14. Ryan M.
    (verified owner)

    Travel a lot and public charging always made me uneasy. This solves it cleanly — plug the blocker in first, then your cable. Confirmed it kills the data pins. Build feels solid metal, not the brittle plastic ones. It’s small enough to forget it’s on the keychain until you need it.

  15. wraith.k
    (verified owner)

    tested D+ D- with a meter, no continuity. so it’s a real block. charges my phone at a normal trickle. tiny, tough, keychain’d. the kind of thing you carry and forget until it matters

  16. rafe.w
    (verified owner)

    the boring essential. confirmed it blocks data with a meter, charges fine, built tough, fits the keys. carry it, charge anywhere, stop worrying. simple as

  17. Hannah D.
    (verified owner)

    Bought after reading about juice-jacking and honestly mostly to stop worrying about it at airports. Plugged it into a USB meter (borrowed from a techy friend) and the data lines genuinely don’t pass. Charges my phone fine. Peace of mind for a fiver-ish. Small and well made.

  18. David T.
    (verified owner)

    Frequent flyer, this is now permanently clipped to my travel kit. Tested it blocks data with a USB tester. Charges steadily. The metal housing seats firmly in the port, no wiggle. For the price of a sandwich it removes a real (if small) risk. Recommend.

  19. m_null
    (verified owner)

    the “USB condom” everyone should carry. tested the data lines are physically not passing — checked with a tester. charges fine, blocks sync. cheap insurance against dodgy public ports

  20. aaron.p
    (verified owner)

    edc travel essential. verified data block with a meter, charges at a steady rate. small enough for the keychain, tough enough to survive it. no reason to charge naked on a public port again

  21. Owen D.
    (verified owner)

    Genuine data blocker — checked with a meter. Charges, doesn’t sync. Slower charge as expected without fast-charge handshake. Sturdy build, good for travel. The only minor gripe is I’d have liked it in a slightly grippier finish for pulling out of tight ports.

  22. Antoine L.
    (verified owner)

    Vérifié au testeur USB : le courant passe, les données sont bien coupées. Je l’utilise sur les bornes de recharge publiques (aéroport, gare) sans avoir à faire confiance à la prise. Compact, solide, accroché au porte-clés. Indispensable en déplacement.

  23. Patrick O.
    (verified owner)

    Plug it in before the cable at any sketchy port and you’re charging power-only. Verified the data lines are dead. It’s tiny, it’s metal, it lives on the keys. Exactly the kind of low-effort high-sense precaution I’ll actually keep up. Bought one for my dad too.

  24. Nathan H.
    (verified owner)

    Conference and airport charging stations always felt iffy. This is the fix — power-only, confirmed with a tester. Metal housing, keyring hole, seats tight. Charges steadily. Small enough to never leave behind. Genuinely good bit of EDC for the money.

  25. Greg M.
    (verified owner)

    Solid little blocker. Tested it passes power, blocks data. Charging is slower through it (no fast-charge, as expected). Build is good. Knocking one star only because the keyring hole is a bit small for a chunky keychain — works on a split ring fine though.

  26. Marie L.
    (verified owner)

    Acheté pour les voyages, vérifié au testeur, ça fonctionne : charge oui, transfert non. Compact et solide, toujours sur mon porte-clés. Je ne charge plus jamais sur une borne publique sans. Très bon achat.

  27. mateo.r
    (verified owner)

    clean little blocker. verified data lines cut. charges fine, metal housing, fits the keychain. travel must-have at this price

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