Actually the Triton has the ability to measure discharged current.

What you want to do is charge then discharge the battery pack two or three times.

Then charge it again and set the Triton to discharge it at the 1C rating of the pack...

e.g. if the pack is rated at 1200mAh discharge it at 1.2A...

Then check how long the battery takes to discharge and how much current the Triton says was delivered from the pack.

e.g. if the Triton reports that it discharged 1100mAH from the pack ( assuming 1200mA capacity ), it is in very good shape.

If it only was able to get 500, then I'd consider the pack bad.