I have had my Zoom for a couple years and all the original batteries have swollen. They have no vents like the Phantoms batteries so I’m convinced they will eventually all swell.
I don’t even keep the batteries in the case, I only put them in the case for transport. Batteries create heat even when it’s self discharging. I have all my drone batteries on a shelf and well aired except for the mini which are li-ion.
