Viofo HK3 Hardwire Parking Mode Power Cable for A119 V3 & A129 Dash Cam Camera
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The Viofo HK3 is a Mini-USB hardwire power cable for the A119 V3 and A129 series dash cams. It connects to your vehicle's fuse box, automatically switches to parking mode via ACC detection, and cuts power at a configurable voltage threshold to protect your battery. It is part of the Viofo hardwire cable range.
A version with a USB Type-C connector for the A119 Mini, A229 and A329 is available as the Viofo HK4. Connect the HK3 to the GPS power port only. A version with an 8-piece fuse set is also available as the HK3 with 8pcs fuse set.
Key specifications
- Connector: Mini-USB
- Input: 12–24V
- Maximum output: 5V 2A
- Wiring: VCC, ACC, GND
- Low voltage cut-off: 4 options
- Parking mode: automatic switching via ACC detection
- Compatible with: A119 V3, A129, A129 Plus, A129 Pro, A129 Duo, A129 Duo IR, A129 Pro Duo, A129 Plus Duo, A129 Plus Duo IR
HK3 series hardwire cable
Parking mode switching
- Supports 12–24V electrical systems
- 4 configurable voltage cut-off options to prevent battery drain
- ACC detection automatically switches parking mode
- Constant power supply
With ACC detection, the dash cam enters parking mode when the engine is switched off and resumes normal recording once the vehicle is started.
The hardwire kit powers the dash cam directly from the fuse box (VCC, ACC, GND), replacing the cigarette lighter adapter and providing coverage from the moment you set off.
While parked, the kit keeps the dash cam running by drawing power from the fuse box, capturing incidents automatically and powering down before the car battery is depleted.
Battery discharge prevention
The HK3 supplies continuous power in parking mode until the car battery voltage drops to the configured threshold, at which point it cuts power to the dash cam.
Configurable voltage cut-off
Four voltage cut-off options are available. When the battery drops to the selected threshold, the HK3 stops supplying power to the dash cam, preventing discharge.
12V / 24V compatible
The HK3 connects to cars, trucks, buses, SUVs and HGVs running on any 12–24V electrical system, making it suitable for a wide range of vehicles.
Cable connection
Compatible with Viofo dash cams featuring a Mini-USB power input. Connect to the GPS power port only.
Explore the full range in Viofo Hardwire Kits.
Specification
| Maximum output | 5V 2A |
|---|---|
| Input | 12v- 24v |
More specs
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What's Included
Viofo HK3 Hardwire Cable
Viofo
About the Viofo HK3
From our tech experts at CEN
A hardwire kit is what turns a dash cam into a parking camera. It draws a permanent feed from the fuse box, keeps the 12V socket free, and includes a voltage cutoff that shuts the camera down before your battery is affected.
Who it suits
A119 V3 and A129 owners adding parking mode without needing the separate fuse pack.
Our tech experts advise
Older cameras draw less current but still need the voltage cutoff set sensibly, especially on a car that sits over a weekend. If you would rather not take the trim off and probe the fuse box yourself, we fit hardwire kits at our Beeston workshop alongside a camera install. See dash cam installation.
Explore the full Viofo range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Viofo
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Frequently Asked Questions
Q: Is this accessory compatible with my dash cam?
A: Dash cam accessories are generally model-specific. The compatible camera models are listed in the product description, and you can contact CEN to confirm compatibility before ordering.
Q: What does a hardwire kit do?
A: A hardwire kit powers your dash cam directly from the vehicle's fusebox, hiding the cable and enabling parking mode. Kits include battery protection so your car battery is never drained below a safe level.
Q: Why would I add a dash cam battery pack?
A: A battery pack powers parking mode for longer periods without drawing on your car battery at all. It charges while you drive and is the recommended option for extended parking protection.
Q: Can CEN fit this accessory?
A: Yes. CEN offers professional dash cam and accessory installation from our Nottingham premises. Contact us to book.
Q: Which dash cams does the HK3 fit?
A: It fits VIOFO dash cams with a Mini-USB power input, including the A119 V3, A129, A129 Plus, A129 Pro, A129 Duo, A129 Duo IR, A129 Pro Duo, A129 Plus Duo and A129 Plus Duo IR.
Q: Will the HK3 drain my car battery?
A: It has 4 voltage cut-off options. When the battery voltage drops to the selected threshold, the HK3 stops supplying power to the dash cam.
Q: Does the HK3 work on 24V vehicles?
A: Yes. It accepts 12V to 24V, so it suits cars, SUVs, trucks and buses.
