Power outages are not uncommon in this area and we needed a reliable source of light other than candles or standard rechargeable flashlights.  This light fits the bill.  It is nice and bright and the swivel head is very convenient.  It is also very useful for working in crawl spaces instead of dragging in one of the shop lights with the long cord and light bulb.  This light does not come with a battery pack but if you have any other Dewalt tools powered by 18v NiCa battery, they are all interchangeable.  I had batteries from an old drill and they work perfectly.