I recently moved and there is no power outlet anywhere outside on the back side of the house so I decided to give this a try. One of the biggest tests was when I used it to run my Masterbuilt Gravity Series Charcoal Grill, a wireless access point for internet coverage of the entire back yard and kept multiple other devices on chargers throughout the day for a cookout. It performed amazingly throughout the entire day long event using less than 30% of the battery. Some other things I have used it for is charging my car and lawnmower batteries with an A/C charger, running a projector outside and keeping my laptop charged while I work outside. This has been one of the most useful purchases I have made all year! Also, arrived 4 days after purchase so shipping time was very reasonable.