Submariner Gold
Active Member
- Joined
- Jan 8, 2018
- Messages
- 198
- Reaction score
- 27
- Location
- Berkshire United Kingdom
- Country
- United Kingdom
- Dash Cam
- Vicovation MF3
Firstly apologies for the detail ... but I wanted to explain fully
I don't think my TQKA battery supports “pass through charging”.
How my set up works, when the engine runs, it powers the dual USB charger [glows blue]. This sends power to the Camera cable-lead on the left, and to the Battery’s charging input on the right [it energises the battery meter and shows % charge in a red LED].
![FA4BAEE9-3E33-46A2-ADB7-5E255AAF407B.jpeg FA4BAEE9-3E33-46A2-ADB7-5E255AAF407B.jpeg](https://dashcamtalk.com/forum/data/attachments/35/35850-f64d4841d4d3d156e34d72371de269be.jpg?hash=9k1IQdTT0V)
Obviously when the engine is off, there is no power to run the camera or charge the Battery, per below
![8770C390-267B-4CCD-8866-D2E283EC6327.jpeg 8770C390-267B-4CCD-8866-D2E283EC6327.jpeg](https://dashcamtalk.com/forum/data/attachments/35/35849-32dd5f2017c8cb8eadeab6cb69ee8f0d.jpg?hash=Mt1fIBfIy4)
When I want to run the camera in “Parking” mode, and the engine is off
I need to manually unplug the cable connected to the camera from my left USB port, and insert it into one of the Battery’s 5V outputs Like below:-
![699DEB41-4571-451A-836C-F8A38CE39990.jpeg 699DEB41-4571-451A-836C-F8A38CE39990.jpeg](https://dashcamtalk.com/forum/data/attachments/35/35848-aff61175f105acef8b321ae1e91516ac.jpg?hash=r_YRdfEFrO)
I can see the battery LED is activated, and the power starts the camera. Naturally with the engine off there is no power from the USB Port.
So I assume the battery is not being charged and discharged at the same time ( not yet been confirmed by the Mfg. if this is allowed, with this battery ).
My questions are
Q1. “do I need to physically undo the cable from the right USB chanel (the cable that is normally used to charge the Battery) , when the engine is off, and I use the battery for Parking mode? (Note at this moment we are not charging the battery)
Q2. I am assuming power can’t leak out of the battery's charging input terminal, and reverse back into the dormant USB charging port? I.e when the engine is off, and I am draining battery power to run the camera.
Trying to double check power wouldnt reverse out of the charging input.
I connected a USB meter, but I am not sure if this is a vald test; as I had to connect the meter the wrong way around, i.e. I would really need a Micro B meter. But maybe it would tell me if the power was present in the input charging cable?? But not too confident of this.
![613A9569-F366-4DC7-A561-3F703D53F9ED.jpeg 613A9569-F366-4DC7-A561-3F703D53F9ED.jpeg](https://dashcamtalk.com/forum/data/attachments/35/35851-3304dc09586c72acd2aa5d1828224d95.jpg?hash=MwTcCVhscq)
As you can see, the meter doesnt turn on. But I really dont know if this is a valid test.
Naturally my main issue is , do I have to undo this cable?, its bad enough having to swap the dashcsm cable![Smile :) :)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png)
i did notice, that the USB port could occaisionally output up to 5.15V , is this too high for the camera? I assume its OK , as the USB spec is up to 5.25V; and I suspect the Volts may drop by the time they have travelled 4M to the camera?
Most of the time, it runs more like 5.11V .
I don't think my TQKA battery supports “pass through charging”.
How my set up works, when the engine runs, it powers the dual USB charger [glows blue]. This sends power to the Camera cable-lead on the left, and to the Battery’s charging input on the right [it energises the battery meter and shows % charge in a red LED].
![FA4BAEE9-3E33-46A2-ADB7-5E255AAF407B.jpeg FA4BAEE9-3E33-46A2-ADB7-5E255AAF407B.jpeg](https://dashcamtalk.com/forum/data/attachments/35/35850-f64d4841d4d3d156e34d72371de269be.jpg?hash=9k1IQdTT0V)
Obviously when the engine is off, there is no power to run the camera or charge the Battery, per below
![8770C390-267B-4CCD-8866-D2E283EC6327.jpeg 8770C390-267B-4CCD-8866-D2E283EC6327.jpeg](https://dashcamtalk.com/forum/data/attachments/35/35849-32dd5f2017c8cb8eadeab6cb69ee8f0d.jpg?hash=Mt1fIBfIy4)
When I want to run the camera in “Parking” mode, and the engine is off
I need to manually unplug the cable connected to the camera from my left USB port, and insert it into one of the Battery’s 5V outputs Like below:-
![699DEB41-4571-451A-836C-F8A38CE39990.jpeg 699DEB41-4571-451A-836C-F8A38CE39990.jpeg](https://dashcamtalk.com/forum/data/attachments/35/35848-aff61175f105acef8b321ae1e91516ac.jpg?hash=r_YRdfEFrO)
I can see the battery LED is activated, and the power starts the camera. Naturally with the engine off there is no power from the USB Port.
So I assume the battery is not being charged and discharged at the same time ( not yet been confirmed by the Mfg. if this is allowed, with this battery ).
My questions are
Q1. “do I need to physically undo the cable from the right USB chanel (the cable that is normally used to charge the Battery) , when the engine is off, and I use the battery for Parking mode? (Note at this moment we are not charging the battery)
Q2. I am assuming power can’t leak out of the battery's charging input terminal, and reverse back into the dormant USB charging port? I.e when the engine is off, and I am draining battery power to run the camera.
Trying to double check power wouldnt reverse out of the charging input.
I connected a USB meter, but I am not sure if this is a vald test; as I had to connect the meter the wrong way around, i.e. I would really need a Micro B meter. But maybe it would tell me if the power was present in the input charging cable?? But not too confident of this.
![613A9569-F366-4DC7-A561-3F703D53F9ED.jpeg 613A9569-F366-4DC7-A561-3F703D53F9ED.jpeg](https://dashcamtalk.com/forum/data/attachments/35/35851-3304dc09586c72acd2aa5d1828224d95.jpg?hash=MwTcCVhscq)
As you can see, the meter doesnt turn on. But I really dont know if this is a valid test.
Naturally my main issue is , do I have to undo this cable?, its bad enough having to swap the dashcsm cable
![Smile :) :)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png)
i did notice, that the USB port could occaisionally output up to 5.15V , is this too high for the camera? I assume its OK , as the USB spec is up to 5.25V; and I suspect the Volts may drop by the time they have travelled 4M to the camera?
Most of the time, it runs more like 5.11V .
Last edited: