Still having problems identifying my global smoke. Sorry for the repost -- after much googling the threadings different than all "similarly compatible" models.. it has only two threads not the three that seems to be on the others.. I have a smoke-51 duo as well, much smaller and three threads. I know one of these is the 808 either d-1 or d-2.. the DSE901 i'm assuming is the Smoke-51.. but is similar to the 808? I'm so confused! Would hate to buy the wrong carto's for the wrong battery.. trying to stick more to the "unknown" one since it charges well and use the 51 as a backup. That charger scares me.. you screw it in and the battery flashes but the light stays green.. unscrew a little and the indicator light turns red but the battery doesnt glow.. not sure if it's a fault of the charger or battery.. no help with returning/refunds either.. this is all becoming VERY frustrating especially for it being my fault from buying it storefront, not knowing about the product, and having them up and leave. For good reason I suppose. Wish I would have ordered it.. then at least I'd know exactly what I got 