I standardized on AA's for years, especially when I could get a decade of use from an AA NiMH and Lithium ion was maybe 3 years. But as Lithium Ion (and LiPo) technology has improved and hardly anyone else wants to use AA and AAA's the amount of devices using them seems to be shrinking so I'm having to move toward the Lithium rechargeable as well.
I still have a couple of the older super thin Startech USB cables left so I'm looking at how to run those up my backpack strap with a power bank inside to have backup power available.