Hi Danny,
i having this problem during my FEMCA race i n malaysia. i using IB3800 cell i think mostly the cell are 2nd generation. i used linear charge of 5amp at first the punch very perfect but after 2min30sec the punch was drop and flat until the cell dump. so after that i increase my charging amp to 5.5 amp the problem still the same. may i know is that my charging problem? thanks