Coming back to the zoom lens analogy, think of how the zoom lens operates ... MegaRay MR250
Dimensions: 5"x13", 7.6 lbs (body), 20 lbs (battery pack)
Lamp: Xenon Short Arc, 125W, 1000 hr
Run Time: 45/65 min
Battery: SLA, 24V, 10Ah
The MR uses four 6V, 10Ah SLA batteries in series to give you a 24V, 10Ah source ...
5/12/2015 - Lockbourne, Ohio