I got the Gooloo 4000, it works great. Amazon has $20 off the orange one.
That's what i meant to say!! The 4000! LOL
I have the GOOLOO 400 amp jump pack. Purchased it in April 2021. I just checked it the other day and it's still at 100% charge. Time will tell how long it lasts and how good of a jump pack it is.
About 3 years ago I purchased a very small EarthX jump pack. It sat for a year and was able to start my wife's Lexus with a dead battery no problem. It has been discontinued.