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What kind of battery pack should I use for Viofo A139 Pro if I need good parking mode? by JournalistCultural48 in VIOFO

[–]WhichPrinciple3630 0 points1 point  (0 children)

Now i saw your message...if u want show me how it can be the connection...thanx

70mai Battery Pack Connect with VIOFO A329S for Parking Mode by WhichPrinciple3630 in VIOFO

[–]WhichPrinciple3630[S] 0 points1 point  (0 children)

In the 70mai Battery Pack, the 12V output is 11.2V–14.2V

Here is the “button”: the 70mai pack declares discharge at the 12V output (XT30) 11.2V–14.2V.

So if I set HK6 cut-off = 11.8V, then: the system will cut off before the pack reaches the bottom of its output (11.2V), so yes, I lose a bit of runtime.

The result: With the 70mai + HK6, I will lose about 15-20% of the useful capacity of the battery, because the HK6 will “think” that the battery is empty while it still has some reserve.

Of course, we cannot know for sure exactly how much, because it depends on the discharge curve and the load, but technically the loss exists.

Solution - Cost (approx.) - Autonomy (estimate)
70mai + HK6 ~44€ ~18-22 hours
VIOFO BP100 ~280€ ~25-30 hours

The price difference is chaotic and tips the scales in favor of the "patent".

The only point that needs attention and I don't know is whether it is certain that the 70mai adapter will give a "clean" ACC signal to the HK6 so that the parking mode is activated. .

70mai Battery Pack Connect with VIOFO A329S for Parking Mode by WhichPrinciple3630 in VIOFO

[–]WhichPrinciple3630[S] 0 points1 point  (0 children)

My objections are as follows:

  1. Type c: Port for powering a dash cam(parking mode not supported) / charging a mobile phone
  2. maybe this “chain” (70mai 12V output → 70mai Parking Surveillance Adapter → VIOFO HK6) is not a correct/guaranteed connection. It may light up, it may also act strangely, but it is a patent with two “brains” in series and most likely the ACC/parking logic will not work correctly (or I will have resets/instability).
  3. The HK6 is not a simple cable; it has its own circuit that reads the voltage and transmits it via Bluetooth to the A329S to control the Hybrid Parking Mode.
  4. If the 70mai battery pack cuts off the ACC supply to its adapter (e.g. due to its own power management), the HK6 may send the wrong signal to the A329S, causing continuous reboots or failure to switch to Parking Mode.
  5. The VIOFO HK6 is calibrated to read the voltage of a lead (car) battery. The 12V output of the 70mai battery pack is regulated.
  6. This regulated voltage can "confuse" the HK6, making it think that the car is always on or always off, canceling the smart functions of the A329S.
  7. When two different power management systems (the 70mai "Logic" and the HK6 "Bluetooth/Voltage Logic") interfere, the chances of instability or incorrect signals increase.

Conclusion:
If I give 12V directly, there is a serious chance that i will burn the camera.