Cells can become unbalanced over time. It's best to equalize them often. The more the better, but I suggest no less than once per dozen charges. You may have one cell storing more charge than the others and it is overcharging while the others are still taking on a charge. There is a chance it could be a bad cell, but nonetheless .... equalize to prolong the life of your cells.
Here is how you do it with the ICE if you don't have a good equalizing tray like the Trinity DPD (Note: much different than a discharge tray).
1. Discharge (10 amps linear) the pack down to 1.1V per cell.
2. Program a new option in your ICE to do 1 single cell.
3. Manually hold the positive and negative leads on 1 cell and discharge (10 amps linear) down to 0.9V. Repeat until all cells are done. This process usually only take around 1-2 minutes per cell.
Holding the leads on stick pack cells is certainly harder than a side-by-side pack. But if your track allows you to poke holes in the shrink wrap seal, then go for it. A combination of aligator clips and very small screwdrivers works well.
Last edited by James35; 10-14-2007 at 12:06 AM.