I just got my Petzle RXP. I bought it because REI stated that there was an adapter that let you use AAA batteries. I went to buy the adapter today an found out REI doesn't sell it. I have scoured the internet and haven't found anyone except a company in europe that offers you the chance to reserve one for September 2014.... Can someone please tell me where to buy this or I'm going to have to return the lamp. Also I know the battery it comes with is lithium but does anyone know if I buy the adapter if I can run lithium batteries in it. I assume I can because the regular batterie is lithium. Thank you.