Hello everyone! I just received my Kangertech Subox mini. been play around with it for few hours and feels great! My friend just help me build a coil for the RBA and it reads 0.7ohm and I'm vaping at 25W. The voltage was displayed as 4.3V. Is it safe to vape at 25W on the 0.7ohm coil? My battery is LG HG2 3000mAh.