[cisf0rcalvin]

Originally Posted by afsar

I think if you power camera directly from battery it will draw a constant and over period of time it will build-up (lets say overnight), car detecting this loss will report "increased battery discharge message".

I have thought over this detail and came to conclusion that a true 24/7 surveillance is possible if you separate this completely from your car electronics. Way I thought is like this:

Buy a small 12v 10ah to 20ah sealed battery which you can hide somewhere behind boot trims. Now buy a compact low power (like 5-10 amp, higher doesn't harm but unnecessery) solar charge controller (no solar panel) and in the solar charge controller hook battery to charge terminal and camera(s) to output terminal. Now using a flat 12v supply from ciggy lighter (whichever is ignition switched) you can hook charge controller's panel input.

This way when you are driving your camera battery is being charged, and solar charge controller is making sure you don't overcharge it. I have calculated that 20ah battery will continuously run one Blackvue camera for appx 60 hours which is 2.5 days even if you don't drive your car at all. If you are able to tuck bigger battery in then record time will improve even further. But beware you can only charge upto microSD card's storage capability (blackvue on full hd 30fps can store upto 10 hrs of recording) any extra time won't be really that helpful. To keep this in recording loop infinitely I think you will can easily add a small solar panel.

Feel free to suggest any better solution as this is what I am going to do in next few weeks.

That's a neat idea. I was also thinking about using a external LiPo battery pack but the issue was getting the right interface. I'm assuming you'll be using a lead-acid battery? Do you know any 12v ignition taps in the trunk?

Would you recommend this? http://www.amazon.com/Yuasa-NP7-12-1...s=10ah+battery

Even though its 7AH, might be easier to work with since its smaller.

Also I found a 7 amp solar charger you were talking about. http://www.amazon.com/Sunforce-7-Amp...rge+controller

Basically it would be from the 12v source --> Solar Charger --> Battery + camera (on the same battery terminal)

Found something similar: http://www.ebay.com/itm/140825589211