Viofo BP-100 & EP-100 Battery Testing

Vortex Radar said:
That would be cool, but to the best of my knowledge, there isn’t any direct data communication between the battery and dashcam to do that.

Blackvue can do it to communicate remaining capacity so maybe Viofo can do it too. Thinkware can also do it, but they require an additional wire connected for the data communication. Give that Blackvue can do it with just a power wire connected (not sure if it’s a wired thing or Bluetooth), Viofo should be able to do that too. @viofo @VIOFO-Support
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Thing is I've ordered the battery pack and I'm going to get a professional installer to do it in the few weeks.
I don't want to pay him again to install an additional accessory that would allow this feature.
 
rcg530 said:
VIOFO had publicly stated they were going to enhance the BP100 firmware with a Bluetooth broadcast feature just like the HK6. VIOFO dash cameras then be able to receive the voltage info from the BP100 without the need for a HK6. I haven't heard of any recent statements on that feature being ready for testing or general use.
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So do you think this will actually happen?
Am I just to use the cables supplied with the battery pack?
I don't think there's any benifit to using the
Hk6 kit because that just allows cut off voltage.
That won't really benifit me in this case?
 
I would like to know about this sooner rather than later in case there's an additional accessory I need to buy because this feature will be something I'll def use.

BTW when I tested my dashcam there were preset resolutions.

But can you for example change resolution per camera.
For example 4k for the front camera
2k for the rear camera

1080p for the cabin camera

Is this possible?
 
joysleep said:
So do you think this will actually happen?
Am I just to use the cables supplied with the battery pack?
I don't think there's any benifit to using the
Hk6 kit because that just allows cut off voltage.
That won't really benifit me in this case?
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Yes, I believe it will happen. I just don't know the scheduling priority this feature has in the development group. It will need a firmware change to the BP100 and it will need a firmware change to the dash camera to know to look for the BP100 Bluetooth broadcast. For the A329S, v2.1 firmware has been stated as the version that will first see this feature.

On Feb 1, 2026 @VIOFO-Support stated this:

The A329S V2.1 firmware which support communicate with the BP100 is under testing.
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The two things you gain when using the HK6 are the voltage level [stamp] that can be placed in the video status line and it can be used with the "Voltage cut-off" feature [A329S series of dash cameras only so far].

The A329S voltage cut-off feature voltage selections are geared towards an internal combustion engine [ICE] vehicle. If you want one of those voltage settings to be the point when the A329S switches from the standard parking mode [Auto Event Detection, Time-Lapse, or Low Bitrate] to low power impact detection parking mode [hybrid parking mode configuration], then it can still be helpful. It depends on how you drive/park your vehicle and how you want to use the battery pack power.

If you decide to use a HK6 with the BP100, it's probably best to get the modified version of the HK6 [from VIOFO] that allows the HK6 low voltage cut-off feature to be disabled. That will allow the dash camera to be powered for a longer period of time. The production HK6's low voltage cut-off minimum setting of 11.8V will prevent the dash camera from taking full advantage of the BP100's stored charge. The BP100 can continue to deliver power with a voltage level into the low 10-volt range before it turns off the power to the dash camera [or dash camera hardwire kit in this case]. The amount of time that can add to a parking mode session can vary based on the parking mode used.

The BP100 includes the USB-C dash camera power cable that supports parking mode operations. That BP100 USB-C dash camera power cable does not have a low voltage cut-off feature nor does it have a Bluetooth broadcast of the voltage like the HK6. You only need the HK6 if you want access to the voltage info.
 
rcg530 said:
Yes, I believe it will happen. I just don't know the scheduling priority this feature has in the development group. It will need a firmware change to the BP100 and it will need a firmware change to the dash camera to know to look for the BP100 Bluetooth broadcast. For the A329S, v2.1 firmware has been stated as the version that will first see this feature.

On Feb 1, 2026 @VIOFO-Support stated this:



The two things you gain when using the HK6 are the voltage level [stamp] that can be placed in the video status line and it can be used with the "Voltage cut-off" feature [A329S series of dash cameras only so far].

The A329S voltage cut-off feature voltage selections are geared towards an internal combustion engine [ICE] vehicle. If you want one of those voltage settings to be the point when the A329S switches from the standard parking mode [Auto Event Detection, Time-Lapse, or Low Bitrate] to low power impact detection parking mode [hybrid parking mode configuration], then it can still be helpful. It depends on how you drive/park your vehicle and how you want to use the battery pack power.

If you decide to use a HK6 with the BP100, it's probably best to get the modified version of the HK6 [from VIOFO] that allows the HK6 low voltage cut-off feature to be disabled. That will allow the dash camera to be powered for a longer period of time. The production HK6's low voltage cut-off minimum setting of 11.8V will prevent the dash camera from taking full advantage of the BP100's stored charge. The BP100 can continue to deliver power with a voltage level into the low 10-volt range before it turns off the power to the dash camera [or dash camera hardwire kit in this case]. The amount of time that can add to a parking mode session can vary based on the parking mode used.

The BP100 includes the USB-C dash camera power cable that supports parking mode operations. That BP100 USB-C dash camera power cable does not have a low voltage cut-off feature nor does it have a Bluetooth broadcast of the voltage like the HK6. You only need the HK6 if you want access to the voltage info.
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Yh that's what I was telling another member on reddit who uses the hk6 kit with his BP100 where he somehow sets the voltage where he knows the battery is running low but then when I asked him how do you know what the battery percentage of the power pack is before it does this?
I don't want to sacrifice more low bit rate recording when I don't need to.
My kit came with the standard hk6 wires.

Tbh I'm not gonna bother with hk6 cos voltage stamp doesn't bother me really
I'm hoping for the firmware update which would allow hybrid parking mode when actually battery pack gets low.

BTW I can still get hybrid parking without the hk6 right.
I'll be able to set up of cut of timer which the bp100 cables can handle right?
 
rcg530 said:
If you decide to use a HK6 with the BP100, it's probably best to get the modified version of the HK6 [from VIOFO] that allows the HK6 low voltage cut-off feature to be disabled. That will allow the dash camera to be powered for a longer period of time. The production HK6's low voltage cut-off minimum setting of 11.8V will prevent the dash camera from taking full advantage of the BP100's stored charge. The BP100 can continue to deliver power with a voltage level into the low 10-volt range before it turns off the power to the dash camera [or dash camera hardwire kit in this case]. The amount of time that can add to a parking mode session can vary based on the parking mode used.
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Yes. Yes.
I love this.
Here's what it looks like @joysleep

 

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joysleep said:
BTW I can still get hybrid parking without the hk6 right.
I'll be able to set up of cut of timer which the bp100 cables can handle right?
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Yes. You will only be able to use the cut-off timer feature for hybrid parking mode.
 
joysleep said:
So what's this actually showing?
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I fully discharged BP100 with A119M Pro in Low Bitrate Parking Mode with modified HK6, (No Low Voltage Cutoff).
12.4V setting = No LVC
It shows BP100 delivered power down to 10.02V (Fluke 117) or 10.09V (HK6).
If a “standard” HK6 was used, power to the camera would have shut off when BP100 falls to 11.8V, (when selected).
This shows why you may want to use modified HK6 to fully utilize BP100’s capacity.
11.8V down to 10.02V is approximately 4% of BP100's 98Wh capacity or 4Wh.
4Wh may not sound like a lot, but now that we have LPID that means approximately 8 additional hours of “stand by” in LPID.
4Wh ÷ 0.5W = 8 Hours.
Since I was there it was obvious to me, but now I realize it’s confusing without a proper explanation.
Sorry for the confusion.
 
Chuck McCoy said:
I fully discharged BP100 with A119M Pro in Low Bitrate Parking Mode with modified HK6, (No Low Voltage Cutoff).
12.4V setting = No LVC
It shows BP100 delivered power down to 10.02V (Fluke 117) or 10.09V (HK6).
If a “standard” HK6 was used, power to the camera would have shut off when BP100 falls to 11.8V, (when selected).
This shows why you may want to use modified HK6 to fully utilize BP100’s capacity.
11.8V down to 10.02V is approximately 4% of BP100's 98Wh capacity or 4Wh.
4Wh may not sound like a lot, but now that we have LPID that means approximately 8 additional hours of “stand by” in LPID.
4Wh ÷ 0.5W = 8 Hours.
Since I was there it was obvious to me, but now I realize it’s confusing without a proper explanation.
Sorry for the confusion.
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Oh right
No apologies I'm the one who's confused.
I just don't know if I should bother tbh.
I would just love the feature of switching to LPID when the battery is at certain percentage.

I'll just hope for the best and wait fir the firmware.
Until then I'll just use timer cut off.
 
joysleep said:
I just don't know if I should bother tbh.
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The whole reason to display “system voltage” in the text stamp on recorded footage is to aid in malfunction diagnosis.
However, it has it has other benefits.

joysleep said:
I would just love the feature of switching to LPID when the battery is at certain percentage.
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Once you get your system installed it will be easy arithmetic to determine what BP100 Battery Percentage will be based on power consumption, and operation run time.
The APP will display power consumption, (Voltage & Amperage).
Volts x Amps = Watts
You can use this figure to calculate battery percentage.
It may even be more accurate than the battery percentage value displayed in APP.
Example:
A329S 2CH Rear = 5 Watts (Low Bitrate Parking Mode)
BP100 98Wh ÷ 5W = 19.6 Hours
50% Battery Life = 49Wh = 9.8 Hours
25% Battery Life = 24.5Wh = 4.9 Hours
But you’ve just given me an idea.
See you in my improvement wishlist thread.
We are getting off topic from OP’s thread.
 
OK so can I ask at the lowest setting on 11.8v with the hk6 kit.
What battery percentage is that approx (viofo bp100) before you tell the dashcam to switch to low power impact detection.?
I'm just contemplating whether to tell my engineer to install this or not
 
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