The SureFire 9AN B90 NiCad Battery will give you about 40 minutes runtime at 140Lu output.
How long will the B90 remain charged in the flashlight? Roughly a month I guess before you start to notice a drop in runtime because NiCads like other batteries loose their charge over time.
The B90 can be left on charge in the CN400 Smart/Rapid Charger (the charger will maintain a full charge without damaging the B90).
Keeping with the 9AN, the KT3 TurboHead Kit is a 2.5" diameter Reflector that focuses the light into a tighter, more intense beam for illumination at longer ranges. The Lamp for the KT3 is the N3. It is also 140Lu/40mins.
SureFire TurboHeads allow the flashlights to be used for longer range illumination compared to the standard Bezels by focusing the light output into tight, intense beams. In general, the TurboHead lamps have the same output/runtime characteristics as the standard Bezel lamps.
Example:
The M3 uses either the MN10 (125Lu/60min) or MN11 (225Lu/20min) Lamps.
The M3T uses either the MN15 (125Lu/60min) or MN16 (225Lu/20min) Lamps.
There are a wide range of TurboHead options for SureFires.
For details, please visit -
The SureFire Discussion Board (SFDB)
and
The CandlePowerForums (CPF)
Thanks
Al