Originally Posted by rcsteve86

I ordered 2 pre-assembled ep4200 packs a couple of weeks ago. I used them this weekend for the HRH Offroad Shootout. They performed great, except that I had battery bars come apart a couple of times. One during practice, one during qualifying, and another during the mains. After adding a little more solder they seem to be a stronger. I have never had this problem with other packs I have soldered. Just wanted to bring this to your attention.