Hi Eddie, I bought the Earth X jump pack a couple years ago and love it. Initially I was a bit cautious with it because of the problems everyone hears about these new fangaled lithiums, but that has faded now and I am amazed that this little unit can do what it does. I specifically bought it for a booster for my IO-240 powered Series 5, as the main odyssey battery is in the empennage for wt & bal. purposes and you can imagine with the long cable run ,starts are sometimes problematic as the weather cools down here in upstate NY . With it hooked up the engine spins like a turbine when I hit the starter. I wired an Earth X compatible plug in the cockpit ,so I can plug it in while I'm in the seat, fire it up and go. When the jump pack isn't in the airplane , its in my truck and here is where it amazes me-I have used it to start my snow plow truck when the battery died, my tractor and various other pieces of equipment. It has never failed to start anything I have used it on, a very handy unit . You can even use it to charge tablets , cell phones etc thru a usb port on the unit. Its always part of my travel kit. The Lipo safe silver case is something I bought to store the jump pack before I trusted the Earth X.Bruce N199CL