6 R123 (780 mah) batteries
(Warning: these batteries are for LED flashlights only. Due to their higher voltages, 2 R123's will burn out a 6 volt incandescant bulb such as a surefire p60/p61. However, 2 R123 cells is great for powering 9 volt bulbs such as the surefire p90/p91 series.


