LOKITHOR Online via Amazon [amazon.com] has
LOKITHOR J2250 PRO 2250A 12V LiFePO4 Jump Starter w/ ConnectMax for $139.95 - 50% off when you apply promo code
7KYLEUYU at checkout =
$69.97.
Shipping is free.
About this item:- 2250A Peak starts 8.0L gas or 6.0L diesel engines even in extreme temperatures ranging from -4°F to 140°F.
- LiFePO4 Battery offers a safer, longer lifespan of more than 2000 cycles at 100% / 8000 cycles at 50% depth of discharge.
- 60W Two-way fast charging with USB-C. Additional USB-A 18W output. Fully charges in 1 hour.
- 300 Lumen LED flashlight with 6 modes: 100%, 50%, 10%, SOS, blink, strobe.
- ConnectMAX Technology automatically detects the connection impedance between the clamps and the car battery, ensuring optimal connections every time and maximizing the jump starter's performance.
- Equipped with 10 safety protection mechanisms including; overcharge, overcurrent, short circuit, reverse polarity, low temperature, high temperature, overvoltage, overload, anti-spark, and reverse charging protection.
- Up to 36-month standby.
- IP65-rated waterproof and dustproof.
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https://www.intertek.co
Editing to add: just because something isn't UL listed doesn't mean it's not safe. The NOCO Boost GB40 is the lithium jump starter; it's got almost 126k reviews and 4.6 stars on Amazon...and it's not UL listed. It, is however, Intertek ETL listed to indicate that it was tested to conform to UL 2743. UL testing is stupid expensive and there are third-party labs (OSHA Nationally Recognized Testing Laboratory, or NRTLs) - Intertek being the most well-known - that will test to UL standards. They'll get the ETL mark, but they can't actually claim to be UL listed.
https://ramuk.intertekc
Second edit because I'm on a roll: and even if something has the ETL mark, you need to do your due diligence and confirm what that means. For example, the AstroAI S8 jump starter with air compressor has the vague "meeting national standard UL & FCC Certifications" in its description. And, in fact, it does appear to have an ETL listing meeting UL standards...for 1839, which is literally just the cables themselves:
https://ramuk.intertekc
So if you're genuinely interested in getting something that's been tested as "safe" (as much as anything can be, barring defects and the possibility of a company changing their product later to be a crappier version of what was tested), make sure you know what to look for.
Third edit because why the hell not: I can't find LOKITHOR in the UL Prospect IQ database. The abridged site (linked below) should be enough to discover if they have a listing, but I went ahead and logged into the site since I already have an account through work and I couldn't find them, either. I have a sneaking suspicion the claim of UL listing is actually a claim that they meet some UL standard, though they're not showing up the Intertek database, either. It's certainly possible they used another NRTL and are legit, but you'd need to find out.
https://productiq.ulpro
https://ramuk.intertekc
Fourth edit because lol: I'm not sure where you're seeing that the J400 is UL listed, because I can't find it on their product listing and it's not coming up with the Rufus search or in any Q&A. I think you might be mistaken.
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I understand the hesitation, but all things being equal - quality components and a non-defective battery - 110F won't bother it at all. I explain why in a different thread: https://slickdeals.net/f/19413771-prime-members-prime-members-astroai-s8-air-3000a-peak-jump-starter-w-150-psi-air-compressor-34-80-free-s-h?p=183625611#p
Model: J2250 PRO
Capacity: 51.2 Wh (4 ah)
Input: USB-C: 5V / 3A, 9V / 3A, 12V / 3A, 20V / 3A (60W)
Input: DC 5-20V, 5A (Max 60w) not sure how that works
Output: USB-A: 5V / 3A, 9V / 2A, 12V / 1.5A (QC 18w)
Output: USB-C: 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 3A (Max 60W)
4Ah battery is kinda disappointing, to deliver 2kA it would have to run at 500C which is wayyy overstretched. Wouldn't have believed 8Ah at 250C either, but at least a good 8Ah would have been able to deliver 1kA.
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