Watch This Before Buying an Emergency Car Jump Starter- UIBI X7

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[@Chrisamic]

Hmmm, not convinced. I've got a separate 12V compressor that will take a tyre from 14 psi (sand) up to road pressure in a couple of minutes. I operate it with the car running. If the car isn't running there's no point airing up the tyres. Adding a little compressor in that tiny case just takes up space where you could put more batteries, or makes the case bigger than it needs to be it might be useful for bikes or basketballs, but that's hardly an emergency is it?
56 psi seems a little high even for those tyres. You need enough pressure to support the weight of the vehicle so the tread is flat. If you're not sure you chalk the tread and roll it on a smooth surface to see where the chalk is removed first. It should be even. IOW vehicle weight is more important than how big the tyres are.
The other problem with these devices is that they often output internal battery voltage as the cranking voltage, basically attaching the internal battery pack across your car battery. That's normally way high. Like nineteen or twenty one volts fully charged. I'd only attach that to a fairly dead battery that won't crank. The power bank may therefore burst into flame, but it's not so likely to take out your ECM. They do it this way because actual voltage control that can handling cranking amps is quite expensive, more than what they charge for these things. There's nothing quite like taking a routine jump start to the level of a really expensive repair.
Also take capacity claims of these devices with a grain of salt. 88.8 watt hours is about ten or twelve 18650 cells. Possible, in a case that size , but it wouldn't leave much space for a compressor. Just sayin'
So yes these battery banks are useful and I do have one in my fourby, but people need to understand they are built to price and treat them as such (ie disposable lithium blow torches). I don't recommend them to anyone without a few warnings. After charging I don't put it back in my car for about 48 hours.