The HV atty I've been using constantly for 3 weeks just burnt out. I loved it and it's gone. I put a standard one on there and it burned out 2 hours later. I have 3 standard one's that don't have any slots in the threads so they don't work at all. No air flow. I have only one that works. I ordered some more HV one's so I'm hoping this last atty will last till I get the new one's. I have an adapter to use 510's but I only have one of those and I hate it. If I loose this atty I'll be vaping my 401's. I have tons of 401 attys and batteries and I like using them but they aint an 801 Chuck. I'm gettin nervous here.