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Not every day, every hour or so. A 16Gb card can fit less than an hour and a half of video (for DR750S-2CH on high def settings, less than 60 min on 'extreme')

Yes. The B-124 uses that dongle to give you a cigarette lighter port to plug in the dashcam. I installed an on/off switch into that dongle. The battery remains plugged in to my actual cigarette socket all the time so it always charges. As long as my switch is on, the camera gets power from the...

B-124 battery should easily last 20 hours. If you need it to last several days, can always get a couple of the extension batteries (which each have more power than the normal). They are stack-able.

My cam is set to 2 or 3 and it doesn't save recordings continuously, but does probably save ~5 min per hour. Even if it's set to 0 though, it's still constantly recording (in case of impact) the only difference is it doesn't save those files. I'm not sure the power difference between the 2 is...

Update on running the Blackvue DR750S-2CH from the B-124 + 2 TQKA '20000mah' packs: Been working fantastic for the past 3 months. I've left the car parked over the weekend a few times and it still lasted to Monday in parking mode. The roughly 1.5 hours I drive per day seems to be enough to keep...

May be able to get away with a simple 5v to 12v converter like: http://a.co/7IElcEw One thing to note is a Blackvue at ~4W is more than twice as much power as the cam in that video is pulling. But assuming you can source that much power from the same wire, should work.

I wasn't trying to give a fair comparison. I'm not suggesting that 4 watts is way above what's appropriate for a camera (though it could be more efficient), just that 4 watts is a lot of electricity. Because as you pointed out, it needs to do a lot. I'm not trying to make an argument that...

Depends on how you look at it. 4 watts is significantly more than I would have expected. For reference, a TI-83 programmable calculator (20 year old technology, which I remember sucking down batteries) consumes just 0.01W while turned on and under 0.05W while calculating/graphing constantly. In...

Here's a photo of the setup. I put everything in the armrest compartment. There's more space in the other center-console area (under the phone charging shelf) but I use that for general storage so preferred to give up the armrest space. Also having the cigarette lighter there made the wiring...

YES. They use LiFePO4 battery cells which won't expand, won't blow up, and aren't even flammable if you hold a flame to them (Important for a car environment) This is why there's so much discussion around the tqka 20,000mAh packs which are some of the only LiFePO4 packs available at a reasonable...

I have my cam (DR750S-2CH) connected to the Blackvue battery pack (B-124) with a switch to turn off the dash cam if I'm going to be parked a really long time. I also got a couple of the tqka 20,000mAh packs a few of us were talking about earlier on this thread, took them apart to harvest their...

Took the battery apart yesterday. It did not yield easily. The top and bottom have essentially a thick sticker which comes off easy enough. then there are 4 tiny phillips screwps on each. The bottom has a metal plate that comes off after unscrewing them. The top is glued on so even after the...

I think I'll try to make my own battery using the cells from this TQKA. Pretty much all you need are the LiFePO4 cells and a battery management system (BMS). They are rated for how many cells they can charge/balance in series (S). In this case, I would make a "4S" battery (Four 3.2v cells in...

Had a chance to test the battery today and wanted to share: tldr: I set it up to draw ~10watts and to my surprise, it actually lasted 5 hours! Actual total power consumed: 46.9Wh During testing, the voltage fluxuated between 4.257V and 4.396V. Not fantastic, especially when you consider that...

There is absolutely no way that battery bank meets it's rated capacity... but I'm curious enough to find out. Just ordered one and I'll test it this weekend.

Not all mAh are created equal. Doesn't take into account at what voltage you're getting that current. You really want to be comparing Wh. The B-124 battery is 76.8 Wh (6,000mAh at 12.8V). If that hotspot battery is 4,000mAh at 5V (I'm just guessing on voltage) that's only 20Wh, or nearly 1/4th...

My Model 3 is great. I'm not one of those Tesla haters... but I don't trust Elon's time frames on absolutely anything. I'm not holding my breath on the integrated dash cam feature. My guess is the Model Y has a fully working dash cam feature when that's released. Maybe we get a beta version in 2...

Will it work? Probably, but I'm not sure how the battery is wired and there's no reason to take a chance. Both the car and the blackvue battery are floating grounds. In general, you should never connect these together. Wiring it properly doesn't cost any more and isn't any more difficult so it's...

Yeah, Almost any DPDT switch will work. This is very low voltage and amperage. (though as you noted, don't use a momentary switch) The main differences in switches you will see is "on - on" vs "on - off - on". The difference there is that the former has only 2 positions and you are either...

Interesting idea. I actually think you want a double pole double throw (DPDT) switch (something like this: http://a.co/5JEfP5R). The reason is: The Blackview and car batteries don't share a ground. Can be very dangerous to connect V+ of one to Ground of the other. The setup should be like this:

I wish. I installed everything myself. I can't put into words how terrified I was at some points pulling panels off my brand new car. It's not the M3 battery though, it's the BlackView battery that died. It can only power the cameras for ~20 hours from full and it was probably less than half...

I had this happen to me today. I barely drove the car yesterday and when I started the car in the morning the B-124 was completely dead from parking mode. I'm going to follow suit and put a switch in-line to turn off the cameras while parked at home.

The B124 battery is a little too big to allow for the tray to remain so I just took it out. I think it's a personal choice if you would rather use the compartment in front of the cup holder for the battery and keep the rear one with the shelf (requires very little additional work to get the...

Makes sense. Thanks. Next time I'll RTFM

I'm not sure I understand how to get the battery to charge at 9 amps vs 5 amps. Is there something in the Model 3 cigarette lighter connection that limits current? Otherwise it would seem you get the same charging rate from splicing the wires right before the lighter connection as plugging into...

I think we're on the same page on this, we just don't have the full picture of how Tesla is managing the 12v battery. My guess is that the car is monitoring voltage and once it dips below a certain point, the car thinks "battery is getting low, I should charge it". So the dash cams draw 350ma...

The battery in the Model 3 is a 540Wh lead acid battery. We know that the Blackvue dash cams can drain the B-124 battery which is 84.5Wh in 20 hours. That's not an insignificant drain. In parking mode, you're draining 20% of the Tesla battery in 1 day if you hook it straight to the terminals...

The B-124 connects to the 12v cigarette lighter plug. While the car is on, it charges and has a pass-through for power to the cameras. Using any lithium ion battery pack would work exactly the same. If you're asking about how I would have setup the charging for those 18650 packs I was thinking...

I have a bunch of 4.4Ah 36V Li battery packs and was initially thinking about using 1 or 2 for this purpose. I ended up getting the Blackvue B-124 because it's just not worth the risk and performance differences. The Blackvue battery uses LiFePo4 batteries instead of Lithium Ion. They are more...

I did the exact same. I picked up the 750S 2-channel but also the battery. ~$500 for both combined isn't that terrible. I feel like the parking mode is a big reason to get these over other cheaper models