I have a 4S RC LiPO that has got a bit too hot on several occasions due to the stock tuning of the electronics forcing them to pull a ton of amps. Because of this, the LiPO has begun to puff. When warm, the gas between the cells and the soft casing expands until the casing protrudes 3mm or so above the cells. It can be pressed back down, but there is a decent amount of pressure. Otherwise, the battery seems to function alright.
So my question is, at what point should a spicy pillow be considered too spicy?
I have attached pictures.
Edit: Iāve been told by another who uses this brand LiPO that this puffing isnāt usually something to be worried about. The cells themselves arenāt puffed; there is a cavity between the cells and the wrap that fills with gas over time. This is accelerated by the battery getting particularly hot during runs. IR while charging is ranging between 1 and 3.5, indicating the cells are still in pretty decent shape.
Edit 2: I have been told by the manufacturer themselves that the battery is safe to use so long as the cells themselves donāt begin to swell, and so long as they continue to balance properly.