I don't see that having no battery or supercap is the problem.

If the dashcam is powered from the car 12V system while the engine is running then it should not power down.
Have you tried driving the car for more than 5 minutes to see if it still powers down? A stationary dash cam with 12V off should power down eventually.

Have you tried connecting with your smart phone to see if you can access the settings?
Can you post a link to the User Manual?

 

I don't see that having no battery or supercap is the problem.

If the dashcam is powered from the car 12V system while the engine is running then it should not power down.
Have you tried driving the car for more than 5 minutes to see if it still powers down? A stationary dash cam with 12V off should power down eventually.

Have you tried connecting with your smart phone to see if you can access the settings?
Can you post a link to the User Manual?

Sir , dashcam is either simply connected to usb lighter charger (5V) or to fuse box (12V via step down buck regulator =5V again) it is also written on the dashcam, (see the photo in the attachment) I drove the car 2 hours , still nothing! Kept shutting down!
I connected it to various phone chargers 5W 2,5 A etc , still nothing!

 

I don't see that having no battery or supercap is the problem.

If the dashcam is powered from the car 12V system while the engine is running then it should not power down.
Have you tried driving the car for more than 5 minutes to see if it still powers down? A stationary dash cam with 12V off should power down eventually.

Have you tried connecting with your smart phone to see if you can access the settings?
Can you post a link to the User Manual?

There is no user manual. Even the Chinese language user guides omit the 750 going from the 600 to the 1000, and neither of those models are anything like the 750.

According to the scant documentation the auto on/off functionality is based on the car power being switch (like a cigarette lighter on the ACC setting) and the “24 hour” setting is accomplished using a “special cable” ordered separately though I can’t find any photos.

The USB label on the silkscreen says “USB12V” which is odd and makes me wonder if they accommodate either 5V or 12V on that jack. If so the “special cable” could be a USB device killer if left unplugged from the camera.

 

Sir , dashcam is either simply connected to usb lighter charger (5V) or to fuse box (12V via step down buck regulator =5V again) it is also written on the dashcam, (see the photo in the attachment) I drove the car 2 hours , still nothing! Kept shutting down!
I connected it to various phone chargers 5W 2,5 A etc , still nothing!View attachment 271862

I didn’t notice that is AVIN that’s for the rear camera, of course. Ignore the bit about the monitor earlier.

 

Sir , million thanks for your answer and your photo of dashcam. In your dash cam , at least there is a supercap, in mine there is only a piece of iron where the supercap is supposed to be! Omg total rip off ! And battery terminals are empty. Could you please tell me Voltage and farad of the supercap in your sameu u750 dash cam ? Yours have mine doesnt , I think this is the biggest problem I face here. Kind Regards

For the record that is a photo from the manufacturer. Yes, they clearly sell it on the fact that it is ”safer” than a battery version.

Does it actually record anything to the SD card?

 

I didn’t notice that is AVIN that’s for the rear camera, of course. Ignore the bit about the monitor earlier.

Thank you sir , i thought the same

 

the thing glued down and then removed by me is a piece of iron to cool down the micro processor.

If you removed the heat sink (“removed by me”), the microprocessor could overheat and thus shut down. I’d either replace it or test the unit by cooling it down, with a fan or aerosol.

Then, the question becomes why is the microprocessor is overheating. With the principle of fixing known problems first, I’d replace those two failing capacitors first.

 

For the record that is a photo from the manufacturer. Yes, they clearly sell it on the fact that it is ”safer” than a battery version.

Does it actually record anything to the SD card?

Yeah sir it recorded, and the quality was good also it records sound, to me it is great but i need to figure out this shutting down problem.
could you please recommend me a supercap value volt and farad so i can order from aliexpress and try . In my view , ifi can put the suitable supercap , it is gonna work. Hundreds of people gave 5 stars and good comments about the dashcam.
PLEASE ADVISE ME THE SUITABLE SUPERCAP
THANKS

 

If you removed the heat sink (“removed by me”), the microprocessor could overheat and thus shut down. I’d either replace it or test the unit by cooling it down, with a fan or aerosol.

Then, the question becomes why is the microprocessor is overheating. With the principle of fixing known problems first, I’d replace those two failing capacitors first.

Sir , it shut down before i removed it that is why i opened the dashcam in the first place.
Check the posted photos, there is none supercap inside where it should be!

 

Yeah sir it recorded, and the quality was good also it records sound, to me it is great but i need to figure out this shutting down problem.
could you please recommend me a supercap value volt and farad so i can order from aliexpress and try . In my view , ifi can put the suitable supercap , it is gonna work. Hundreds of people gave 5 stars and good comments about the dashcam.
PLEASE ADVISE ME THE SUITABLE SUPERCAP
THANKS

Based on the physical size, I think the largest one of these I linked earlier is probably it. The 5.5V looks right too.

But as I said above I agree with @MrChips it is unlikely to be the solution to this problem. Still if you fix this problem having the cap to continue recording while parked would be a nice thing.

 

Based on the physical size, I think the largest one of these I linked earlier is probably it. The 5.5V looks right too.

But as I said above I agree with @MrChips it is unlikely to be the solution to this problem. Still if you fix this problem having the cap to continue recording while parked would be a nice thing.

Thank you so much sir,
1-) the supercap is gonna be 5,5 V and the Farad?

2-) a general question I mean: would a dashcam work without battery or supercap?
with all due respect sir, all the dashcams I ve seen on youtube and amazon etc either have a lithium ion battery or a supercap which is sth i found extremely unreasonable.
I would be glad if you answered those 2 questions of mine
Kind Regards

 

Thank you so much sir,
1-) the supercap is gonna be 5,5 V and the Farad?

2-) a general question I mean: would a dashcam work without battery or supercap?
with all due respect sir, all the dashcams I ve seen on youtube and amazon etc either have a lithium ion battery or a supercap which is sth i found extremely unreasonable.
I would be glad if you answered those 2 questions of mine
Kind Regards

There is a link to AliExpress in my previous reply. The largest of them is 15F 5.5V check the dimensions against the space you have for it: 32mm x 16.5mm x 30mm

 

There is a link to AliExpress in my previous reply. The largest of them is 15F 5.5V check the dimensions against the space you have for it: 32mm x 16.5mm x 30mm

Thanks a lot sir

 

There is a link to AliExpress in my previous reply. The largest of them is 15F 5.5V check the dimensions against the space you have for it: 32mm x 16.5mm x 30mm

Sir one more thing, the one with the super cap of which photo you sent me, does it work ? Or just like mine , it is also faulty?

 

Sir one more thing, the one with the super cap of which photo you sent me, does it work ? Or just like mine , it is also faulty?

That photo is from the manufacturer. I didn't take it.

 

The fact that is so inexact about the time it takes to shutdown makes me suspect a power problem rather than an auro-power-off function. But that’s not certain.

The TS said:

I have already done the bench test with a 5v 2,5 A phone charger but no use . still the same.

The TS camera fails after (approximately) 5 minutes regardless of the power source.

Could you please tell me Voltage and farad of the supercap in your sameu u750 dash cam ?

I would suspect that WITH a 5V cap or battery your camera might make it through the 5 minute point. The reason for this thinking is that the camera may be devoting energy to writing the recorded file to the memory chip. They don't constantly write to the mem chip, they store it in a volatile memory then write it to the chip. Mine does so every five minutes. FIVE MINUTES! However, this is just guesswork. I'd recommend getting a 5V source and wire it into those two battery ports just to rule my suspicions either confirmed or ruled out.

As for the size of the super cap - dimensions matter. As Ya’akov said:

The largest of them is 15F 5.5V check the dimensions against the space you have for it: 32mm x 16.5mm x 30mm

"Size Matters".

 

Maybe someone can have a shot at answering this question.
What does the supercap do? What is the function of this supercap in this application?
I don't have an answer except that a battery or supercap is used to maintain some kind of operational function when external power is removed.

 

Maybe someone can have a shot at answering this question.
What does the supercap do? What is the function of this supercap in this application?
I don't have an answer except that a battery or supercap is used to maintain some kind of operational function when external power is removed.

The camera's "parking mode" which allows continuous recording while the car is parked can either be wired right ot the battery (ugly) or it can use a lithium cell or supercap. That's all it's for, to power the camera for a while when the car isn't.

On some cameras, it enables crash detection as well and the camera will start saving the video in the buffer to the SD card if there is an impact.

Just a backup power source.

 

The camera's "parking mode" which allows continuous recording while the car is parked can either be wired right ot the battery (ugly) or it can use a lithium cell or supercap. That's all it's for, to power the camera for a while when the car isn't.

On some cameras, it enables crash detection as well and the camera will start saving the video in the buffer to the SD card if there is an impact.

Just a backup power source.

I see.
My Geko dashcam has "parking mode" that is triggered by vehicle vibration. Therefore I am going to assume that it has a lithium battery inside.

 

The camera's "parking mode" which allows continuous recording while the car is parked can either be wired right ot the battery (ugly) or it can use a lithium cell or supercap. That's all it's for, to power the camera for a while when the car isn't.

On some cameras, it enables crash detection as well and the camera will start saving the video in the buffer to the SD card if there is an impact.

Just a backup power source.

My DC's have had both SC's and Li-Ion batteries. The purpose as I understand its functioning is to allow the camera to write to the mem chip after the car has been shut off.

Also, as Yaakov suggests, there is the feature of "Parking Mode". Useful when you park in a parking lot at the grocery store and you want to see who dinged the side of your car. I've never used that feature because I almost always park facing into the space. Another car may bump mine from the side or the rear and even though the camera may start recording - it's not recording the offender. Not unless I start backing into parking spaces. But that makes loading groceries into the car bothersome. And since I have a handicapped sticker for my car - parking in HC spots means far less dings to my doors. But yes, that's another reason for the battery or SC.