Hello, I converted a 6D Maglite awhile ago to use the Malkoff LED conversion. The light is awesome however I think it is time to do away with the standard batteries. What rechargeable D size batteries should I go with? Is Lithium Ion the way to go? Does anyone make rechargeable Lithium batteries in D cell format? Low discharge better than high discharge and still provide good light? I have been sifting through some forums (some of which are pretty old) and so decided to post a new thread to sort it out. Thanks for your help!