Picked up this jewel online on Black Friday for thirty bucks. It measures 6x3x1 so it's small enough to carry on the bike, says it will jump a car battery 20 times before recharge plus it comes with adapter to charge all the different phones and run a laptop computer and has an LED flashlight built in. It has 400 cranking amps an I believe it would likely keep a boxer engine running if you lost a stator while on the road. What cha think ?