Mannlicher,
The torch you have is called the Magcharger, it is the same size as the Maglite 3 D (12 1/2 inches long) and weights one pound 13 oz.
It will produce 200 lumens for about the first 30 minutes, declining in output as the battery (Ni Cad) drains.
However is the best of the Police rechargeables flashlights (Stinger etc) except for the sole exception of the Tiger light that put over 250 lumens.
However all those police flashlights that still cling to old technology Ni Cad are missing the best of the Nimhs and Lithium Ion technology, much more FLAT OUTPUT and the ability to run high amperage bulbs.
I have a little light (made on the Maglite 2 "C" host, 13 oz. 9" long) that I have modified with Lithium Ion batteries, that produces 181 lumens and run for 1 1/2 hours, here is a picture with the comparison of lights and batteries,
The little 2 C light and the two Lithium Ion batteries and the Magcharger with the heavy battery Ni Cad.
The little light run the same upgrade Xenon bulb that can be put in the regular Maglite 5 D, the two compare side by side exactly and the difference from 200 lumens to 181 lumens is not noticeable.
Beside the special batteries provide a flat output to the end of the charge.
The technology of Nimhs rechargeable batteries is even better, by using a special battery carrier and special high amperage super-bulb; I can put nine AA rechargeable Nimhs batteries with high amperage and high capacity, and run a 1050 lumens bulb for 45 minutes in a Maglite 3 D specially modified for that.
The special battery carrier
Such light blow out of the water any other Police flashlight made today,
Magcharger 200 lumens
Stinger 220 lumens
Tiger Light 250 lumens
Surefire M-6 (six 123's every 20 minutes) 500 lumens.
As battery chemistry is improving constantly, in the future we will have better power sources.
As an example, Sanyo is coming by the end of the year, with a rechargeable Nimh battery that will keep its charge for years (the Eneloop battery) rivaling primary alkaline batteries.
The future will look "brighter" with the new batteries that are close to be introduced in the market.
black bear