Hello, I am looking at picking a couple Fenix lights up for LE duty use. I am looking at both the TK11 and the PD20 I know that the TK11 can use a rechargeable batteries. I am new to the rechargeable lithium game so I could use suggestions on a battery and charger. I wasl also wondering if the PD20 could take a rechargeable lithium, and also a suggestion on that. I would also like to find a pocket clip for the PD20, if anyone knows of one that will work. Thanks!