One idea I have been working on is using the flat 10 AA holder from Mouser, which can be rubber-banded or Velcro'd to the bottom of the KX1. I got a few of them at $2 each. The 2x5 holders fit into my waist pack, but are unwieldy in use. If I can figure out a way to carry the 10x1 holder in the waist pack I will switch to it. Leigh WA5ZNU