dogman wrote:Bigger pouches, or stack of pouches, makes sense they'd start bulging some at some point. I had a mental picture of them having to swell a LOT to bend the box, and stretch the straps though.
It's fairly softish plastic. A little stiffness from teh ribs in it, but not all that much, vs the pressure it could build inside. Been a while since I saw the pics over on DIY Electric Car of a disassembled one, but IIRC there aren't actually separate pouches inside, but rather just a lot of layers for what amounts to a single pouch, and the plastic casing is the "pouch". There is a pressure release vent on the top between the terminals on the ones I have, under a sticker.