I like separating them! I bought an 8 pack of that size bag, so I may be able to place two 3 or 4S bats in there..? Then I bought a larger pair to put them all in ...As far as the LiPo bags are concerned, I've decided to have a bag for each of my 5000mAh+ 6S batteries (12 in total). After watching the video of a fully charged battery going south, I'm sure that any in the same bag would also be damaged or not to be trusted in future.