[jsr]

I did use paste flux. I have various solder types (including tin silver) and none of them worked well. I've never had any problems soldering any other batteries, including other LiPos, just these. My joints ended up looking the same as the stock solder joints (with a bit better reflow). Perhaps the factory isn't using the correct type either. Regardless, the consumer shouldn't be needing to redo what should be correct from the factory.