Im no expert, but from all that Ive read, and successfully bringing back 3 out of 4 batteries myself, This doesn't look good agkirk.
The charging method discussed here talks about charging to 60 Volts at 100ma, which is .1 Amps, not 2.5 Amps. Did you follow the pdf here?
https://forums.segwaychat.org/showthread.php?t=36096
Charging higher is not recommended as it would likely damage the cells. If there was any life left in those cells, I doubt there is anymore.. sorry man, it doesn't look good for that battery.
