Looking for a jump pack

Agree—the first pack I owned was Li-ion, but I eventually noticed it bulging in my glovebox and took it gingerly to hazmat disposal, then collected and also disposed of the identical one I had given a family member. Then I searched for LiFePO₄ options.

They're out there; I found a nice one from Schumacher that might have been a discontinued model, but Tractor Supply could still get them. The search was hard, though, because the exact battery chemistry often wasn't featured in the product description; it might be on a separate spec sheet if you could find it at all.

 

Yep; I've seen that happen with many laptop computers - that's the problem with those small compact jump packs. they get tossed under the seat, glove box, or spare tire wheel well and forgotten about until you need it. The question is it operable when you need it? As I've indicated before, the cars interior gets really hot and really cold - usually beyond the extremes of the boxes OEM tolerances. That's why I don't think that it should be left in the car. I check mine and toss it in the car for road trips. Around town, I have alternatives - AAA or ride share if push comes to shove.
I do carry a cigarette lighter powered tire pump under the seat, and I know that vane pump will break sooner or later - due to the temperature extreams inside the car, under the seat. That was for all those OEM tire flats I was getting.
My larger gel lead acid battery based jumpers, live on my work bench and require a top-up charge about every 9-12 months. Sometimes I forget and the low battery lamp would flash and beep at me. I keep at least one of them topped up at all times - so I'm ready to go anytime. I have a USB-C cable hanging off of them to exercise the battery - recharge my cell phone while I'm working. There's no surprises; whereas shoving something under the seat of your car for 18-24 month and then being surprised it doesn't work when you want it to......

Just my two cents.......

PS those larger units has longer jumper cables; which is what the OP wanted and keeping the jump pack in your living area will keep those jumper cables soft and supple; not frozen and hard to manipulate.

 

This Lokithor model has long cables and good capacity.

LOKITHOR J3250 PRO. Pricey on Amazon at $209 but has 20% now. I got my unit for $90 years ago.