Eyefivedashcam
New Member
I’m just glad I found this forum. Lots of useful information here.
Yo Nigel,I'm not sure that discharging the battery pack below 11.8 volts is a good idea. It may go to significantly lower voltage, but there isn't actually much power left in it at that point, and a full discharge will reduce the lifespan of the battery pack significantly more than an 11.8 volt cutoff. Not saying that a cutoff disable option is a bad idea, just that I wouldn't recommend using it for an LiFePO4 battery pack.
This “small” 32GB SD Card is NOT intended to serve as the main memory card for the service life of the camera.I'm not keen on the idea of the 32GB SD card as I would end up as e-waste for me.
The battery pack's BMS may well cut off the power at 0%, but if you look up the technical information for discharging LiFePO4 batteries, it is clear that at 11.8 volts there is not much power left and there is general agreement that although you can go to 0%, it is not good for the battery lifespan. You may want to go to 0% if you don't care about lifespan, but it should probably not be recommended, especially as you should not have much to gain. Did you actually measure how much power was unused at 11.8v cutoff by connecting the IGN and seeing how much longer it lasted for? It appears in your post that you just timed how much longer the battery lasted with the camera powered off, which is obviously going to be a lot longer than if something had been drawing power...Yo Nigel,
Long time no see. lol
Welcome back.
The battery pack's BMS (Battery Management System) has taken this into account.
The battery pack's BMS is designed to completely discharge the battery to "0%".
Maybe @rcg530 can confirm this.
-Chuck
If you are having a high rate of returns within the first 30 days of use, the most likely cause of this is the camera’s advertised claims DO NOT match the consumer’s expectations when it gets into their hands.Amazon which has a high return rate, this will cause extra loss when users return the camera. 90% of Amazon returned products are almost new.
It looks like i need to perform another test / experiment.Did you actually measure how much power was unused at 11.8v cutoff
I don't think this fully applies in this situation because of the battery pack's BMS.but if you look up the technical information for discharging LiFePO4 batteries
A huge percentage of customers will use the SD card in the box. A very low percentage will cast it to the side.Definitely want the parking mode events audio readout. It really shouldn't be that hard to implement with a counter in storage and some audio clips. It would be a great advertising feature. I had a car alarm 1 billion years ago that would beep for the amount of times the car alarm went off while I was gone.
I'm not keen on the idea of the 32GB SD card as I would end up as e-waste for me.
That is a very reasonable expectation, however from the voltages we see, it seems almost certain that you can use the guidelines for individual cells, remembering that there are 4 cells in series so you need to multiply the voltages by 4, and since the cells are in series and there will be some imbalance, sticking to the guidelines is more important than for single cells. I suspect the developers were more interested in winning the comparison test for camera runtime by at least 1 second, than they were in achieving a 10 year lifespan for the battery pack!I don't think this fully applies in this situation because of the battery pack's BMS.
I think this applies to discharging individual LiFePO4 cells when no BMS has been implemented.
But I've been wrong before. lol
I don't understand what this means.remembering that there are 4 cells in series so you need to multiply the voltages by 4
I would also like to add that I would love if parking mode had the feature of geofencing for when the car is at home.Thanks for your so many significant suggestions. We will take them into consideration and please give us time to keep optimizing.
1 km is quite a lot. I have 4 stores with parking lots within a radius of 1 km where I can’t do without parking mode.I would also like to add that I would love if parking mode had the feature of geofencing for when the car is at home.
I currently spend a lot of time at home, so discharging the cars battery till the HK4 turns off seems wasteful to me (even when it’s set to the max 12.4v/24.8v)
I would love to have a feature that when I enter a 1mile/1km radius of a designated area, parking mode is automatically not enabled.
The feature already exists.I would love to have a feature that when I enter a 1mile/1km radius of a designated area, parking mode is automatically not enabled.
When I advised this option on another forum, I was told that it is very difficult.The feature already exists.
Just turn the camera off with the power button.
There appear to be 4 groups of 5 cells, each group has 5 in parallel, the groups are in a series of 4, which will give 4x the single cell voltage.I don't understand what this means.
When I took apart the BBMC PC8 I found it was made up of 20 cells;
Maybe you should have used an A139 with 3 channels!The Cellink Neo APP indicates 67% battery life, 28 hours remaining.
Why does science take so long? lol
Way ahead of ya.Maybe you should have used an A139 with 3 channels!
Excellent, although it might be a good idea to remove it at 25% remaining, otherwise the HW Kit will cut off sooner (due to voltage drop caused by the extra load), and the results on how much longer an A119 will run will be inaccurate.I connected my Drok USB load tester, and cranked it up.
Good idea.Excellent, although it might be a good idea to remove it at 25% remaining, otherwise the HW Kit will cut off sooner (due to voltage drop caused by the extra load), and the results on how much longer an A119 will run will be inaccurate.