Math and APP questions.

[SanPatHogger]

Building a target camera using parts from a video. Camera draws 200mW, pretty small draw. going to power it from a car battery. 12v 650cca, amp hours on most car batteries is not listed but I do see 40-65 ah is what most are acording to JD power. Most battery draw calculators wont match such a small load with such a big bettery. I'm guessing the camera should stay on for a day or so? I only need a few hours so should be way more than good.
Also I am going to order an android tablet to watch the video on. But is there an app where I can watch it on my iPhone for now? Seems FPV apps are not really popular for iOs.
Thanks in advance.

 

[mick243]

assuming 40 amp hour (useable, thats maybe a 80-100 amp hour sticker) 12v battery, thats 480 watt hours, with a 200mw load, you get 2400 hours of battery time...... ok your average car battery is not rated for long slow discharges like a proper deep cycle battery, but it will easily go a few days between charges, yes it will destroy the battery over time, but for this useage even a battery that will no longer crank your car will last all day as long as it charges to 12.8v

 

[SanPatHogger]

100 days... I could leave it out for the weekend and watch my feeder with it. Just go out when the hogs show up. Put a solar panel on it and leave it until something goes bad...

I'm pretty excited about it. I think it's going to be sweet.

 

[mick243]

Absoluteley, old shit car battery, 10w solar panel and observe remotely. Check the acid/water level once a month.