I feel your frustration...
I ordered the double-510 boxless kit from Cignot, which arrived today. Price was great, shipping fast, service responsive, and the atomizers and batteries were perfect. But the AC-powered 'desktop charger' comes with a cord that is LESS THAN ONE FOOT LONG!! No exaggeration, I measured 9.5" from wall to charger body. Thank god it's a standard cord connection that I have spares of laying around, from boomboxes and what-not...
Regarding noise (coming from someone who's exceptionally sensitive to circuit hum) that is sometimes benign, other times a sign of a transistor or capacitor that's not healthy... If others report no noises from their 5-way charger, I'd ship it back for replacement myself, on the assumption that it's a defect waiting to fully fail.
j