The Surefire 7Z was a rechargeable combat light, now discontinued. Essentially, it was a 6R with combat grips. It could use either the rechargeable battery or two lithium batteries (along with a spacer). It produced 50 lumens of light (with either battery), was 6.9 inches in length, and weighed 7.5 ounces.
The D-3 is a real good light that uses expensive batteries. It would make a great back up if you carry another light. Also you can use the HOLA for a twenty minute run time. Clickie switch is an option.
I have one and I also have 2 Streamlight Polystingers with the quick 2.5 hour DC charger.
Are the 8X that they have listed for $30 (no transformer) $79 (AC charger) the same thing as an 8AX / 8NX? How much is a transformer? Rather, what is the wattage / amps so I can find out how much at rat shack. If its not the same as the 8AX/8NX series, is it any good? How does it rack up to a Streamlight Stinger?