I have several 6.0 and 2-9.0. all less then 6 months old. Batteries barely Last 1/2 of what they did when new. Brought to DeWalt service center to test. 2 failing and covered under warranty. Rest all checked out with a pass but don't last a crap. Any thoughts of this. Too much hassle to deal with Yanni Sent from my E6810 using Tapatalk