Hi, I would like to upgrade my ten years old Maglite 5D. I'm thinking about having five NiMH D cells, 12 amp-hour. I would like to have high power bulb but I only can think of xenon bulb from Maglite. I would like to have halogen if can, I don't really want to change the bulb socket. I also would like to mod something that you can charge batteries without take them out of flashlight just like Magcharger.