Lipo question

[racingdwarf]

Been thinking about this so thought I would get the oople missives thoughts.

Got a set of intellect saddle lipos month or so ago, used them about six times then on one run the car shut down, thought it was strange, then when I went to connect them to the charger I got a puff of smoke from the negative connection as I went to plug it in, checked I had all connections right and they were so tried again, and again smoke so when I got home got the volt meeter out and checked both packs, one was ok but the other was over discharged

So returned them to the shop who sent them to schumacher who have just returned them saying they were out of balance, they cycled charged etc and then sent them back.

Thing is I have 9 packs between my son and myself from a range of manufacturers orion, etc all far older than the one I'm having problems with.They run in the same cars,same esc same chargers (one orion and one LRP) and I balance charge! yet I've never had the same problem so my question is what would have caused the battery to go so far out of balance

[beale]

Sounds like high resistance on neutral connection (loose when under load)