Ridgid has a new 5 Ah battery available.  The model of these batteries are R840089. Pretty soon you will be able to pick these up at your local Home Depot or online.  Not sure when they will hit the market and start making them available for the consumer.  I was glad to see Ridgid finally came out with a 5 Ah battery.  It seems most of the other companies have already introduced their 5 Ah batteries and have been waiting for Ridgid to come along.  Ridgid is starting to grow their Gen5 lines, so this will definitely help people increase run time and productivity.