[suicideneil]

Check the cell voltages to see if one or more is somewhat lower after its been charged and left to dit for a day or two.

Rest the lipo on a flat surface and see if it rocks back and forth due to a swollen cell pushing against the others and making the pack bow outwards in the middle.

Remove the shrink and carry out a closer inspection- trouble is sometimes they swell up during use then shrink back down afterwards, so the only real way to tell is to use it.....