One can even push the output power higher by soldering a 10 Ohm resistor parallel to the big one marked 6.2 (6.2 Ohm) on the driver board. I have 235mA with the standard 3.0V CR2 fully charged, and after soldering the 10 Ohm resistor it went to 268mA stable, decreasing rapidly from 290mA. I could not raise the current to any higher with any other modifications, even if trying to connect an 1 Ohm resistor parallel, showing the circuit to have its limits. The only possibility is to increase voltage. At 8V there is the desired 300mA present. It would be nice to modify the original friver somehow to achieve the 200mW+ with the 3.0V CR2 batts.