Battery Tender 2000 Amp Power Station and Lithium Jump Starter, 030-2040-WH

I've always had issues with my car battery getting some corrosion around a post and then losing connectivity to the car. When that happens, a jump start can get me going long enough to get home to my post cleaner and my trickle charger. But having to rely on strangers is sometimes sketchy and not always guaranteed. This thing is awesome — it saved my bacon not once, not twice, but thrice in a day: to home, then up to get more post cleaner foam, then back home. It takes truly 5-10 seconds max to deliver a charge to the car battery. I have not used and probably won't use as a charging pack for phone or anything like that, as my need is specific to my car battery. I won't go without this thing on long trips — because you don't know when you will need it. And you never know when you can be the Good Samaritan to someone else. Lightweight; appreciate the hard clamshell case; durable build, I don't feel like I'm holding a cheaply constructed item; and easy to charge with 5V->3A usb wall charger.

charges slow with provided charger, only USB. i haven't jumped a car. i primarily use it for a 12v power source to operate auxiliary brake on my tow car behind motorhome instead of running down the car battery. Connected for approx 4 to 5 hours and goes down to 75%, then i top it off to 100% for the next day. 7 days so far and no issues.