4.0 volts appears to be a very good placing. Don’t great also higher as it's possible you'll blow the cartridge. One more moreover is you'll be able to deliver the magnetic adapter and only need to have a single battery for normal carts and AiroPro. Much like the Stay Rosin https://garrettpasxj.blogrelation.com/39819203/buy-airo-vape-cartridge-with-paypal-can-be-fun-for-anyone