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Update:- After opening the battery case, I found one of the terminals rusted through due to unknown water ingress, the cells did not appear to be damaged, so I purchased a SeeSii battery spot welder from Amazon and thinking I might be lucky salvaging the Cellink B battery, I also purchased pure...

So far this battery has given excellent service for years, unfortunately where the battery was placed, in a deep recess in the rear of my estate, I noticed the camera was no longer working, upon investigating I noticed that rain water had found its way into the car, and the Cellink B battery...

Thank you for your quick response considering the cost of a replacement camera I will post the F770 front camera to you for checking, and hopefully I may be lucky its not terminal especially as it worked for two months after the 3 volt battery was installed, and yes as you stated the camera...

Thanks for the offer just out of interest is it possible for the camera to be working perfectly on returning home. then the next morning to be completely dead, you will see that I did have trouble with the internal battery a couple of months ago...

I replaced the internal 3 volt F770 battery at the start of October whilst I initially had problems with one of the trace tracks detaching, I got round that problem by using a thin piece on covered wire soldered directly to one of the pads, the unit was reassembled and put back into operation...

Does anyone know if the CPL filters fit both front and rear cameras on the F770.

I have note MOT stations also don't like the dash cam working whilst they carry out the test, in fact on my wives car which has a Transcend 220 they unplugged it and removed it from the screen and left on the front passenger seat, when I took my own vehicle in for a MOT I just switched it off...

The easiest way I have found to avoid inserting the memory card into that gap on the F770 is to leave the wires attached and slide the camera of the mounting, you can then see more clearly where the actual memory card slot is. especially of windscreens with acute angles. To take the camera...

Out of interest did this procedure cure your problem or do you still get a crackle noise when turning off.

Are there any bridges on that stretch of road you are referring too, because I have noticed that you do get mobile speed warnings on some bridges as you approach to go underneath, I would not dismiss the warning it totally it may be that a mobile camera has been there but not often, to give you...

I have recently upgraded my Thinkware 64gb card to a Sandisk Ultra UHS-1 A1 128gb card, my firmware is the last Thinkware update version 1 .0.0.8, the format was left at exfat as supplied, what I did was copy all files from the thinkware card to the new 128gb card, and it's been working for...

I have always shut it down that way without any problems, as soon as the camera has shutdown there should not be any power drain on the Cellink, in fact my vehicle as its not a daily driver it has been left at times for 4 to 6 weeks before the vehicle is used again, and the cellink is still...

I also have my F770 connected via Cellink B battery and when the vehicle is on the driveway, I also turn the camera off via the right button which is a press & hold untill you hear a tune, and I've never heard any crackling noise during the turn off procedue.

Thanks for that information unfortunately a bit to late for me, as I have now soldered two wires in place which makes changing the RTC battery easy, without causing any more damage to my printed circuit board. Requirements for those users that wish to still do the job themself s. 1. They need...

Update - I have managed to salvage the camera from my previous disaster after attempting to resolder the RTC battery in place, I had a mishap and the printed circuit battery contact pads & traces got detached from the board. After some thought and also checking on youtube regarding repairing...

My Thinkware F770 was purchased in 2017 and is out of warranty and the backup battery has also failed, and like others on here I've invested a lot of time installing and money into this Thinkware F770 dual camera system including a Cellink battery setup, only to found the tiny backup battery...

I also installed the Cellink battery path to avoid the risk of ruining the expensive AGM battery fitted to my vehicle, I can't remember what I paid for the Cellink B in 2017 I think it may have around £200 mark, both vehicle battery and the Cellink B have work flawlessly since the installation.

SirCoza- Thanks for that information not been on the forum for a long time, and my F770 installed a long time ago and up until recently being going perfectly using the Thinkware 64gb memory card, but this year I have been having the request to reformat card for data integrity message, and...

Sandisk extreme 64gb works ok in the F770 also Samsung evo 64 gb works, but like you I tried Lexar 633x High performance 64gb that does not work, but please bear in mind those two that have worked for me have not had a long enough trial yet, the mileage I've used them so far is about 1500 miles...

yes keep us posted if its ok, in the meantime I might try a little bit of isopropyl alcohol on my trancend and see if it removes the felt tip marker ink I used on the bezel as this is now out of warranty.