The NiteCore D11.2 and EX11.2 are physically the same as the first versions of these lights, but version 2 has a new interface as requested by consumers.
Version 2 of these lights give the user quick access to all modes including strobe, SOS, maximum output, and minimum output. Previously instant access to all of these different modes was not possible. Output and run time are the same as the original versions, which is a good thing. The D11.2 still utilizes a single AA battery, and the EX11.2 also still uses a CR123 lithium battery. Alkaline AA batteries should NOT be used in the d11.2.
The unique interface and great output puts these lights in the top tier as far as every day carry lights are concerned. Small enough to carry in your pocket, and bright enough for any task.