Because I have a good supply of AA rechargeable Energizers and Rayovacs that I use in my WT, I also use them in my TX-1000. Seem to last pretty well. I start every day with a spare, fully charged set in a zippered vest pocket of my calling vest.
I use one of the two FoxPro Welded Ten AA Packs that came with the Krakatoa 2 in the Shockwave proper. Again I keep a freshly charged pack on board. These packs last a long, long, time for me.