Finally got one of the big guns in stock. It is the SR1500 with an SST-50. The new SR2000 with an SST-90 Flashlight driven @6.5 amps should be in stock in March and both of these light have great great runtime.
These batteries like the rest of the flashlight are an uncompromised solution to overkill and power. We made this to be extreme in reserves for any situation that it might be called upon. Our SR3000 SR6500 will use the same over-engineering approach in their construction.