battery short?
 

I accidently touched the batteries together when i was putting then in my car. It made a pop noise. It was very brief. Are my batteries still Okay?

Probably your pack is fine. But without testing that's a firm maybe.

Check each cell for voltage across the individual cell.

Cycle it and make sure it's charge / discharge time is normal. If there is a reversed or shorted cell, you'll lose voltage and runtime. For instance I had an OLD 1700 SCR pack that had a shorted cell that I didn't realize, I was only getting ~1400 Mah from and average voltage was down quite a bit, not a full 1.2v, but significantly. When I removed the bad cell and made a 4 cell pack with the rest, it came right back to ~1750 Mah at the same discharge rate with voltage right where you'd expect it to be.

You can just use a normal digital multimeter to test for a dead cell, check each cell individually, and it will show no voltage difference across it if it's dead. For cycling just time discharge from full and compare it with a similarly rated pack, if a cell is gone, you will notice a significant difference.

The pack should be fine if any of the cells did not vent. You will definitely know if a cell or pack vents. The shrink wrap melts and it makes an terrible hissing sound, like it is ready to explode. If it didn't vent, discharge the pack on a discharge tray, let them cool on a fan, then cycle them.

what if it did ? what happens?