Regarding portable stations, I have had a few high quality ones and am never buying another one again. I used each station exactly one time to try it out. The next time I needed it, the battery was toast, thereby defeating the purpose of the portable station.
On a related topic, I also refuse to buy cordless drills anymore for the same reason. I have a powerful cord drill that is way less expensive and gives me full power every time.
Yeah, I'm that guy.
Sounds like a battery maintenance issue. Those 'old' styple jumperpacks use AGM batteries and just like any kind of lead battery needs to kept charged or else the plates have sulfation and not work anymore. Best way is basically have them trickle charge/battery maintainer connected to them all the time. Lead acid batteries deteriate with time, so you will need to replace the battery inside the jumperpack every few years. You don't have to replace the entire thing.
These days lithium jumperpacks are on the market, that won’t need to be charged all the time (and shouldn’t!). Generally without any compressors or those kind of features. Lithium batteries will degrade with time too, but are far more user friendly maintenance wise. You do see a lot of (too) cheap Chinese ones...
Just keep in mind battery, just like the battery in your car will not last forever. When you buy them, it will be just for a few years.
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