Those bags were designed to have the charger itself outside the bag and the Li-po pack inside it.
As long as the chargers air vents can "breathe" and it is charging at a low rate (0.25mA) it could work. As yours has.
For someone wanting to push two bays at 1A each I suspect the charger would not last long in a sealed bag.
With LIPO cells only the battery is inside the bag, the charger is outside the bag. With our regular batteries we put both the battery & the charger inside, and that generates a lot of heat which can be a problem.
I set my charge box on top of a laptop cooling pad.
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OK so now I am curious. I know with all of the lipo guard bags I have (purchased 4 years ago) there are 2 inch openings at the fold on either side and even with 4 18650 batteries or a mix of 18650, 18350 and 14500 batteries charging at the same time on my nitecore intellicharger i4 charger I have never felt the charger or batteries even get a little warm while charging? I also use the bags when I charge my isticks, coolfire, MVP2s, ego one, egos batteries and none have ever gotten warm while charging? Is is the norm for batteries and/or chargers to get warm or hot while charging? The only time I had any type of issue was with the (proprietary)wall wart charger I bought with my coolfire that got super hot while charging and after the vendor replaced it no more issues.
