Hello. I hope I'm posting this in the correct area. Please forgive me if I'm not. I own an authetic Vamo V5 and I love it! It works like a champ! My wife is always stealing it so I went on eBay to buy her one. Already bought mine there so I figured it would be ok. Hers arrived today and there are some serious differences between our two units. Mine has a low ohm limit of 1.2, hers is 1.3. Mine displays battery life from the lcd menu while hers displays current instead! When I built her matching kayfun to a 1.4 ohm single coil and tried to vape at 3.4 v with 6 w there's hardly any taste at all! Jump it up to 6.5 w and it scorches her mouth! There's a huge jump in those 5 w that I have NEVER seen in mine. Also, the internal volt meter on hers will read say 3 v while my eleaf voltmeter reads 1.5!!! Wth?!?! I rebuilt her coil twice just to make sure it wasn't me but I was already certain of this as a 1.4 ohm single coil is kinda hard to screw up! Same thing happens. Her unit drained my freshly charged mxjo 2500 mah AND a fully charged AW 2000 mah in merely a few minutes! I'm stumped! My question is: Did I buy a defective unit or just a clone or maybe a defective clone?? The listing stated it was authentic but the differences in operation and the issues I'm seeing make me doubt that. It was a USA seller however from previous communication, their English reminds me of communicating with the Chinese. I've demanded a refund but have yet to hear back. I expect to hear from them by tomorrow. Have any of you heard of this? Doesn't the Vamo V5 always have a display option for the battery life? This thing doesn't operate like my Vamo that's for sure. Any advice or explanations are appreciated. Thank you.