Don't over-discharge your mod or battery!

Now the vast majority of regulated devices show you a battery life indicator. Often you can see the battery indicator drop while vaping. That means when you hit the firing button, the battery discharges. You should keep in mind that it is a good practice to charge your mod or batteries before there is no charge remaining at all and over-discharging cells is a common way to prematurely drain your battery before its time is due. To protect your battery as possible, such as Eleaf iStick TC40W, stop and charge the mod or batteries at 10-20% charge remaining to get the most longevity out of your battery cells.