Cant say I am terribly impressed at present. Batteries are reasonable on track but the cells are starting to go out of balance very quickly. I have 4x SMC 6500mah 70c 14.8v packs, 3 of them are out by 0.05 and one of them has one cell dropped 0.4v from the rest.

2 of the packs are 3 race meets old, the other 2 are 2 race meets old. Always balance charged, always stored at 3.8v.