OXILAM Jump Starter, 4000A Peak Car Battery Jumper Starter Portable, Up to 10L Gas and 8L Diesel Engines, 12V Jumper Cables with Battery Pack, Power Bank, 600 LM LED Flashlight, Orange

Very straightforward. The battery came halfway charged, I charged it for about 3 hours, till it was fully charged. I measured the car battery at 2.96V (2.4L SUV, 450 amp battery), connected the jump starter and turned it on, waited for the green light to be solid, and then I heard a few clicks, which is normal. Turned the car key, to my surprise, it started right up. I really didn't think it would work that easily. After I disconnected it all 4 charge indicator lights still light up, but It can be from 75% - 100% charge, still great. I tested the flashlight with my light meter app at 1 foot away, and it comes at about 700 LUX which does come close to the 600 Lumen it advertises (not a comprehensive test, but it is bright). The pack alone weighs about 0.61lb or 278g, if you're interested. And 26.64Wh of capacity is labeled on the back. The cable length is about right to charge the car battery, good prongs, easy to carry as it comes with a black bag, and it really is lightweight, and built solid as far as I can tell, I will come back and update this if it fails.

Jumps exceptionally well

Jumped my sedan from a near dead battery for a weekend while waiting to go to the shop! Can jump 2x with full charge pack for my experience. This thing is legit and I bought a dozen to give out xmas.

It has a set of 4 LEDs that, when the on/off switch is set to on or the device is being charged, show the level of charge. But what does each level mean? Does one LED mean over 20% or over 25% or what? Instructions say to not use it when it is charged below 20%, but what indicates that? It arrived with an unstable initial charge level. I expect that is the state its gets into if left too long without recharging: It showed 3 LEDs, but using the big LED (flashlight) for just a few seconds reduced the number to 2, a few more seconds to one, then zero. I charged it overnight (don't know how long it actually needs, but it was late when I received it). Next day, I used it to start my car. It started instantly. So working one out of one uses. After that use, it still shows 4 LEDs, if turned on.

Is great for getting rid of bulky jumper cables. Also serves as a remote charging source for I phone. Well made and easy to use.

Just used it for the first time and it worked. I was actually surprised at how small it is. My other one is like 4xs bigger and apparently this one has 4k amps vs my other one is only 1k. Once you use it make sure to charge it again soon as the single jump will eat up about 50% of the battery and it may not work for a second jump later if you need that. Also make sure of your battery is extra dead to leave it charging for a few minutes before you crank the engine. In some cases I've had to wait 20 min before the battery could be revived but usually it works right away.

I was excited to try this after a few months of owning it and finally had a use for it this thing couldnt handle the voltage and died first use no charge no lights just died what a waste and cant return it any longer

Works like a charm. I've had to use it on my motorcycle since I've bought it and it is very dependable. It's not bulky and the cable length is just right for a motorcycle. It's easy to use and pretty quality for the price. I would recommend that you get this if you need one and you don't want to pay a hundred bucks