Top positive review
This is a ONE star review.
Reviewed in the United States on April 23, 2018
Like others here, my jump starter arrived broken and with clear signs of use. You plug it in for charging and it "charges" to 100% in less than 1 hour, which is a lot faster than it should. It won't jump start your car for nothing. Its internal battery is dead.
It is true that amazon won't accept returns on this item, but if you contact them requesting a refund, they will refund you in full.
So if what happened to me happens to you, take you refund and do the following:
>Search for and buy a 12V 7Ah battery. They are cheap and under $20. I even went for a larger capacity (same physical size) 12V 8Ah battery also under $20 ($18) from ebay.
>Take the Jump Starter apart and replace the internal battery like I did in the pictures. YouTube can help you disassembling it.
>Since you are there, oil the compressor motor (pics). Stanley is so cheap they saved on oil on this product. Some one star reviews here are also about the compressor dying in their 2nd use and lack of oil must be why. It also makes the whole thing less noisy. I've also put some hot glue on the rubber connections to prevent air leaks.
>Reassemble it all together and you've just got yourself a brand new and improved jump starter for $32 in under 20 mins of work!