I just wanted to start this thread because I feel it is important for people to know and understand this. Some suppliers might not like this thread, but I feel it needs to be said. We all know the new manual 901 batteries and passthroughs are coming out. Some suppliers have received some shipments of them already and some are awaiting them. Rumor has it that orders already out all have NON sealed batteries and passthroughs. Rumor has it that the Chinese are supposed to fix this and more batches will be coming out that ARE sealed. My personal recommendation is that I will NOT purchase NON sealed batteries or passthroughs unless I want to seal them myself with caulking or soldering them, and I do not wish to. My recommendation is to ask the supplier you intend on buying from the quesion if they are sealed or not sealed before purchasing so you can make an educated and informed decision. You will waste a lot of money buying these because it is inevitible that juice will leak in them and the switches will indeed stick. I have the brand new manual 901 passthrough and I LOVE the manual switch. I do not drip. I am very careful. In less than 5 days using it, my switch is stuck now and it fried my atomizer. The light just stays on, which means stuck switch. The manual switch is WAY more awesome and powerful, but without them being sealed, we are no further ahead in stuck switches and problems with these just like the automatic ones. No difference. So anyhow, just a word of caution to anyone not understanding this. IMO it is a waste of money to invest in these things unless you plan to seal them yourself or you buy them sealed.