VIOFO HK3 ACC Hardwire Kit (Mini USB)
A well documented Mini USB hardwire kit for VIOFO cameras that need parking mode.
We bought Dash Camera Vehicle Hard Wire Kit - Mini USB (compatible with G1W-C / Mobius / Spy Tec cameras). It's no longer documented anywhere, so this page reviews the closest well-covered match. It is a Mini USB dash cam hardwire kit from a known dash cam maker with published specs, sold on Amazon at a similar price.
The short version
- Owners of a VIOFO A119 V3 or A129 series dash cam
- Drivers who want parking mode recording without a flat battery
- Your camera is a G1W-C, Mobius or other brand; VIOFO does not list it as compatible
- You only need power while driving and a socket plug is fine
- You are not comfortable working in the fuse box
What owners like
- VIOFO cameras run best on VIOFO's own kits, which supply the power they need
- Three wire kits unlock parking mode, which two wire kits cannot
- Hardwiring is a tidier long term setup than a battery pack or socket plug
Common complaints
- Each camera needs its own kit
- Install means finding the right constant and switched fuses, which takes a circuit tester
- The plug shape alone does not guarantee a non VIOFO camera will work
Based on A DashCamTalk forum thread, the UK VIOFO distributor's page and two dash cam retailer pages. No Amazon review text was used..
Research scores
Scored from the maker's specs and what owners report. Drew's own notes and photos will refine these.
Ownership
Drew's hands-on notes for this product are on the way. Long-term updates will be added to this timeline.
What it does
A three wire fuse box power cable with a Mini USB plug that runs a VIOFO dash cam full time and cuts power before the car battery runs low; reviewed here in place of the generic two wire Mini USB kit it resembles.
- ACC wire tells the camera when the ignition is off so it can switch to parking mode
- Adjustable low voltage cutoff to protect the car battery
- Frees up the 12 V socket and hides the cable behind trim
- Works on 12 V cars and 24 V trucks
- A version bundled with a fuse tap set is sold separately
A good pick if you own a VIOFO A119 V3 or an A129 series camera and want parking mode without draining the battery. The trade-offs are a fuse box install with three connections, and compatibility that VIOFO lists only for its own cameras, so owners of a G1W-C or Mobius should not assume it fits.
How it compares
Specs
- Input
- 12 V or 24 V vehicle systems
- Output
- 5 V, 2.0 A
- Connector
- Mini USB, 90 degree angle
- Cable length
- 4 m (about 13 ft)
- Low voltage cutoff
- 4 settings: 11.8, 12.0, 12.2 or 12.4 V (23.6 to 24.8 V on 24 V systems)
- Wires
- Constant battery, ACC (ignition) and ground
- Working temperature
- -40 to 80 C
- Listed for
- VIOFO A119 V3, A129 Duo, A129 Duo IR, A129 Plus Duo, A129 Pro Duo
Worth knowing
- VIOFO's UK distributor advises matching the exact kit model to the camera model, since connector shape alone is not enough.
- Confirm the constant and ACC circuits with test equipment and the vehicle's documentation; professional installation is recommended if you are unfamiliar with vehicle wiring.
Questions
Does the VIOFO HK3 work with the A119 V3?
Yes. VIOFO and its retailers list the A119 V3 and the A129 series.
What is the difference between a two wire and a three wire hardwire kit?
A three wire kit adds an ACC wire that senses the ignition, which the camera uses to switch into parking mode. Two wire kits only supply power.
Will the HK3 drain my car battery?
It cuts power when battery voltage drops to the level you choose, from 11.8 to 12.4 V on a 12 V car.
Does the HK3 fit the A139?
No. The A139 uses USB-C and needs the HK3-C.
Sources
- Amazon.com: VIOFO HK3 Acc Hardwire Cable for A119 V3/A129 Plus Duo/A129 Pro Duo Dashcam
- The Dash Cam Store: VIOFO A129 HK3 ACC Hardwire Kit
- VIOFO UK: HK3 Parking Hardwire Kit for A119v3 and All A129 models
- Dashcam-shop: Viofo Hardwire Kits, Selection and Compatibility
- DashCamTalk forum: Best hardwire kit?
Researched 2026-10-02. We bought this product; our page is built from the maker's details and what owners report across reviews and forums. We never copy Amazon customer reviews.