i ordered 80 turnigy 5ah 20C 6s packs from china, only 2 of them had cells that were out of balance and none of the cells were at zero volts or puffed. that was two years ago.
one year ago i ordered 37 zippy flightmax 5.8ah 10s packs from usa warehouse, 2 of them arrived with one cell at zero volts, and one pack had a little bit of corrosion on one balance tap, it had gotten some water in the packaging somewhere, i dunno if it was before or after shipping though. all of the turnigy that i had, even after running them into the ground (accidentally, using them for different stuff and not using bms) i was able to bring back just by charging them.
but with the zippy, once they discharge too far there is no bringing them back, and even had a few of them puff and flame by discharging them too far. the catch is that i was using the turnigy with 9 parallel strings, and the zippy with only one string, so it's not a very fair comparison.
overall though i think i like the quality of the turngiy packs much better: the cells are all soldered to a PCB that holds the tabs, rather than the tabs simply welded/soldered to each other. and the turnigy balance wires are made of silicone, while the zippy are just cheap pvc. the zippy come with better main bullet connectors and 8awg instead of 10awg wire though.
just my thoughts
