I bought a Schumacher 800pmAh,, 400 peak 200mAH cranking, charges my cell too.has a wall charger but I bought a converter to put in 12v socket.
Ive used several times for my jeep.
Bought.one for our Chrysler 5.7 as even one on my boat w/Volvo Penta V8.
Total uses 20 including people in parking...