Makita 18V LXT Lithium-Ion Cordless 18 LED Flashlight, Flashlight Only DML816 - The Home Depot
Built my own portable DC power supply based on the one Tom Sachs sent to AvE, which in turn is based on a DML186/LXLM01. I wanted to make mine a bit neater,
Makita BL1860 18V LXT 6.0Ah Li-Ion Battery and DML186 18V LED Li-Ion Flashlight Bare Unit - PowerToolMate