Well there's an expensive lesson. Here's another...
I soldered the Deans connectors on my TP 3S 2100 without plugging the other side onto it. It was off a little from the heat and made it hard to get apart. I ended up yanking on the wires and ripping a solder tab inside the pack. I sent it to Thunder Power with a reciept showing it was less than three months old and they gave me a replacemewnt for half price no shipping charge.