I've built probably 12 RX packs with the Energizer Nimh in the last four years. Never had one fail. I am an expert at soldering, though, so i wouldn't recommend it to anybody. I use 100 grit sandpaper to rough up the ends, clean with iso, and apply solder paste with a toothpick. Once the cells are tinned, I use braided copper to link them. After the pack is built, I form charge them at 50 ma for however long they need. Then I discharge them with my Triton to see their capacity. I do this 3 times. What's amazing to me, is that they will take EXACTLY what they are rated on the cell. The last three 2500 ma packs I built discharged at EXACTLY 2500 ma, and charge back up the same. I've saved about $250 over the years doing them myself.

But again, I'm not going to suggest this to anybody.