Just picked up one of these lights from Costco with the $4 coupon discount; very nice light for the price. Vector VEC137CO.
It uses a 12V 3AH sealed lead acid battery, and has a task light on the back end of the light for low level, long term illumination (15 hrs stated).
The handle has an interesting locking pivot that lets you use it as a pistol grip or a lantern grip, with a good rubberized feel to it.
A fold up stand lets you put the light down on a flat surface , adjustable somewhat for the angle.
Standard H3 55W halogen bulb is used for the spotlight, and the task light doesn't seem to be user replaceable, but probably will last a long time. It has a rather yellowy underdriven look to it, so it's probably not very highly stressed.
The difference between this light and the other Vector spotlight I have, besides the task light, is that it allows you to run the light directly when plugged into the lighter socket. They don't recommend using it with the supplied AC adapter because of its 300mA output, but if it's connected to a 10A source, it's able to handle it.
The switch is pretty hard to actuate; a 3 position slide switch that needs to be pressed down to turn on. Definitely no worries about accidental turn on, but it could have been a bit easier- no pulsing of the light for signaling on this one; too hard to turn on and off.