This jump starter is awesome. It is so far the largest and most powerful jump starter I have ever owned.I just purchased about a week ago and yesterday I was able to test it by starting an 8.6 liter six-cylinder diesel truck with a dead battery. Nothing happened on the first try. After consulting AUTOGEN customer service, they advised to press the boost button to start a dead battery which i forgot. Then I try it again. It spun the engine just in seconds, as if it had a brand-new battery. I should say it was much better than I ever expected.Pros:1. Really safe: I tested it by connecting the clamps reversely. It alerted, but nothing bad happened. No sparks at all.2. Powerful: start my 8.6-liter diesel vehicle right away;3. Convenient: Used the battery for 12V vacuum cleaner and air compressor directly, no extra cable required;4. Bright flashlight: hold the power button for 3 seconds to turn on the light. Pretty smart design. The flash flight is really bright.5. Quick charge USB ports: I can see it charges my new iPhone much faster than a regular charger.Cons:1. It does not support 24V vehicles; I wish AUTOGEN could have a 24V model soon!2. It does not have a port to charge laptops as other models. It would be nice to have, but not necessary for this professional model.If you like a really powerful jump starter with a large battery to last long time, this is definitely the one! You can just tell by feeling the weight on your hand. To be honest, I would say this price for what it is is a bargain!
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