https://www.amazon.com/gp/aw/d/B09C6C6BR1?psc=1&ref=ppx_pop_mob_b_asin_title I bought this a month or two ago when my work vehicle had a slow leak in one tire and had to be refilled every couple days. Works great, you set the desired pressure and it'll shut off when it hits it. Charges off a USB-C cable, the same kind most phones use, so you can just charge it up and keep it in you trunk with a jumper box or something.