Hello, reporting in myself here. In receipt of 1 901 manual passthrough. Giving my thoughts......NO the battery is NOT sealed. The quality is of the same "China" quality as the automatic. The only difference is it has a sleek manual button to push on it. A definite YES on the manual gives more control and a better vaping experience than the automatic. The button is nice and firm on it, so I can't see it going off on it's own very easily. You do have to take a nice push on it. I personally think they MIGHT hold up a little longer than the automatics because of the switch getting stuck on those so easily with juice. However, the quality of the wire and all that coming apart at the LED could still pose a problem. I'm still thinking it might be wiser to pay triple the money, but get PS's manual built in the USA. I'm sure it would last longer and have a much better wire on it. But these are fine in a pinch.