I was thinking of buying an unlimited data plan and using an old phone to record around my car through an app.
Problem is the power source, how big of a battery do I need to keep in my car?
Like… can I just use one of the regular travel chargers and like switch it out wit another daily or? Would it last a day?
Like how big does it have to be for a week then?
lets say you got a mediocore fon containing a 4Ah battery, which will last 12h when constantly recording (estimated, correct it if I am wrong). A 20Ah powerbank will run the device for app. 2.5-3 days. Two power banks around 5 days. Charge powerbank from the usb port or a usb cigarette lighter adapter. Usually cigarette lighters get switched off when you turn off the car to prevent the 12V battery from discharge