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And have to wait how long for someone to show up? These products exist for a reason, convenience and safety. You should always have jumper cables just in case and AAA is great because no matter the issue they can rescue you but these portable jump starters are great because I don't need to wait on anyone else or hope someone is around. More importantly I don't need to have enough room for another car to be along side to jump it. This particular jump starter has a polarity checker so you can't damage things by accident like you can with jumper cables. For me, it's about peace of mind knowing I'm less likely to be stuck somewhere. That is priceless imo.
Yes, chances are very good that the battery in my car and my gf cars are on their last leg and should be replaced. It could also be that we simply don't drive our cars long enough to charge them. Either way the point of this thread was to see if anyone had experience with lithium ion jump starters and since nobody had recommendations I went out and bought one based on as much research I could do. After owning it for a while I figured I would leave my impressions of it for others to make use of in the event they want one. Unlike the Amazon reviews I provide more information and I wasn't paid to review it, I bought and paid for the device myself. I hope someone finds it helpful. And of course I can always answer questions people have about it.
AAA response is dependent on where you live. I happen to live in a central and densely populated area. The last time I called them they showed up in 30 minutes on a Saturday morning. My view is to give advice which solves the problem, which is a car which will not start. If anyone wants to take the narrow view and focus on one product, don't get on my case for wanting to help.