I have three ATD led lights. I have an older NiCd that lasts about 2 hours. I have a 30 LED Lithium Ion (ATD-80133) and a 60 LED Lithium Ion (ATD-80136) I just got the 60 LED so I can't say how well it works. It's rated at 4 hours of continuous use. I know the... Login to read more.