hi everyone, i'm new here, I've recently bought the spytec a118-c off of amazon for my car, i love it so far, but i was wondering if i can use a power bank as a power supply while the car is off, i also want to try to use it as a cam to catch one of my dog who always pee on in the corner when i left for work, i have 6 dogs btw, i was looking at this power bank http://www.amazon.com/gp/product/B00VF2IC9I?psc=1&redirect=true&ref_=ox_sc_sfl_title_1&smid=A1NF3Y91PIV130 on amazon which have the car jump starter as well, it seems to be handy, if i could power up my a118, how long do you think it will last? thanks in advance and sorry for all the question as very new to this hobby.