Imazing Portable Car Jump Starter - 2500A Peak 21000mAh (Up to 10L Gas or 10L Diesel Engine) 12V Lithium Auto Battery Booster Power Pack with Jumper Cables, 110V Inverter and QC 3.0…

I used the Imazing Portable Car Jump Starter once on my 20 year old 4.7 liter V8 with a completely dead battery (2 months unused, wouldn't even click the solenoid). It started the engine first try. I connected my inrush/peak current meter and it only took 200 amps to start. The jumper was at 90% and went down to 70%. On the second start (to test the capacity of the jumper) it took 168 amps and was still at 70% life, same for the third test. No heating of the battery pack was detected. A truly impressive product. It will take years to see if it holds up of course. After I recharged the truck battery I tested the inrush current of just the battery (no jumper) and it measured 551 amps. "The Tundra starter motor is a 2kW motor, which divided by 12 volts is 166 amps" so the168 amps is right on the money. Everything over 166 amps in just inrush current which only last milli-seconds. Once the inrush is over the starter motor can only pull it's max rotating current (not the locked rotor inrush amps).

There are a million of these power banks/jump starter packs it seems like. I took a chance and bought the smaller one of these (top in picture) a year ago. I've used it a dozen or more times jump starting cars and light duty diesel trucks. I've used it as a power source to charge tool batteries (in a pinch, not ideal), cell phone, power a portable scissor jack (5 ton) and an air compressor (small car type). It has been stored in my vehicle during the heat of summer and the cold of winter. I check it once every 3 months for a charge and if I use it I charge it back up. This unit retains it's charge very well.Now I've "upgraded" to the bigger version with the 110 inverter. I'm very pleased with this companies quality of product. Haven't had an experience with customer service yet because I've had no need to. I do not usually do reviews but when I find a gem I like to share it.

Update 9/6/21- well…..my other vehicle (FJ Cruiser) had a dead battery and I decided to grab this thing because it was still sitting in the garage. I hooked it up not expecting anything and it started right up! Drove around a bit to charge the battery up and stopped. Wouldn’t start (battery ended up needing replaced)…hooked the jump starter pack up and it fired right up again! So….apparently it isn’t enough for my diesel sprinter (review prior to purchase stated it worked for heavy duty diesel rigs). It did nothing for my sprinter even with a partial charged battery. But with a bad battery in my FJ it had zero issue and worked well. Updated from 1 star to 4.Sat for a few months after I bought it. Finally had a need to use it and it didn’t work. Figured maybe it just needed charged. Borrowed a jump starter from someone else and plugged this in to charge. Couple weeks later needed it again. It said it was charged. But as soon as I tried to use it the charge % immediately dropped and it wouldn’t do anything. Had someone test it and they said it had no output. Too late to return. Emailed the company and never heard back. Expensive paper weight.

Wow. Let me just Start off by saying that I’m pretty impressed with the amount of power access ports.Not only will I be able to jumpstart my car in an emergency situation but charge my phone.Pros• 2 USB Outputs• 1 three prong outlet - AC• 2 BRIGHT LED lights• Plug in Jumper Cables -Approximately 1 Foot• 1 DC Output• Includes Car Charger• Includes Standard ChargerCons• The Charging Case itself seems kind of Cheap - Some sort of rubber bumpers would be nice to protect it when dropped.• It’s a lot BIGGER than I thought it would be - Would be nice if it was 1/2 inch Slimmer to conserve Glove compartment/Trunk SpaceOverall I’m pretty happy with this charger compared to others. What I like most is that it offers not only the USB ports to charge your phone but a 3 prong outlet to power other items.

Lo compré con mucha ilusión y, hasta regalé uno que tenía pensando que había hecho una gran compra. Cuando lo necesité no funcionó.

My previous battery jumper died 14 days after the warranty was up-company was not willing to help me out at all-Thought I would try a different brand with a longer warranty period-I have tried all the features of the Imazing and all are working properly-I have not had vehicle to start yet but all the other outlets are working including the AC converter-tried a 120 volt night light and it worked fine-The unit charged completely to 100% which I drained and recharged to test-all OK-This unit must be charged with it's own wall adapter and not with a USB cable like others-

The media could not be loaded. I have been debating about what battery charger to get for awhile now and after much research have chosen this one. I am very happy with this charger so far, I have jumped a dead battery on a 5.7l gas engine and a 6.6l diesel motor. After hooking up the unit I had to wait between 3-5 minutes for it to have enough power to start. The size is my only complaint, it is larger than most other style jump boxes but compared to most other bulky starters sold at the same price this is a great value! The included case makes for easy storage under the seat. I will be keeping this with me for unexpected circumstances and recommend anyone else reading this to do the same!

Lots of power and if your car won't start this may work. It also may not. Several times I've tried with friend's cars and I had to pull out the cables. It's okay as an emergency when no one is around to give a jump but it may not work if it's super cold and the battery is drained.