I do not recommend this product. I was so excited to purchase it but after 9 months it died: wouldn't charge & a flashing light w/ a "TEMP" warning appeared. I never left it in extreme cold or hot temperatures and I had only used it 8 times just to put air in my tires. Of course QVC was useless when I contacted them, given that it was past the 30 day trial period so I contacted the company (ZAGG) to see if there was any way to repair this product. They were nonchalant and, of course, said "no". They offered to give me $25 off on the purchase of a new one, and acknowledged they only have a 90 day warranty even when items are purchased from them. Needless to say I told them what I thought of their product and customer service and hung up.
In reading the reviews on this product I don't think I just got a lemon. There are too many negative comments. I'm sure that is why the warranty is so short. I am wondering if people write reviews early on in using the product, only to find out how shoddy it is in the long run. Or, perhaps quality control is so bad that it is hit or miss as to whether you get a good or bad one. This was not an inexpensive purchase so I am really bummed. Buyer Beware. Check out other similar type devices, their warranty, and the reputation of the company before buying this dud.