Back a few years ago when IBs first appeared in the R/C scene, everybody bought them right away because of the capacity.... And just about everyone at the track I raced that bought them had this happen..
I have pretty much stuck to GPs... never had a cell pop or go bad before its time.
A lot of my buddies are using the EP cells.. but they seem to have some probs too.. cells going bad.. The EP 4200 and 4500 have some exceptional voltage though.. seems to be a gamble..
I'll stick with my GPs if given a choice.
I'm very surprised that Trinity gave you the time of day.. let alone offered to replace a pack! Maybe they have realized that if you are charging 2-3x the amount for a pack... ya better have some decent customer support!
Jerome