I've mentioned this before, but my entire "prep" for this year's hurricane season was to purchase a 4 pack of "D" cells and a Coleman High Tec 3AA LED lantern....the D's are for my ceiling fan project and a 2D LED MagLight....the AA Eneloops work the 2D LED MagLight with adapters (I stick a quarter in the base to make better contact) but only get a couple of hours on the fan as opposed to 9+ hour output of a D cell...very happy with my conversion to AAs across the board.... the CR123s are for the high output SureFire LEDs (retro fit modules from Malkoff and SolarForce (HK)...