2-Cell

Makes overall flashlight ~ 5" long and 5.3 oz.

Provides 1.5 hours runtime at full 235 lumen output.

Provides 8 hours useful runtime.

  3-Cell

Makes overall flashlight ~ 6" long and 6.6 oz.

Provides 2.5 hours runtime at full 235 lumen output.

Provides 12 hours useful runtime.