This device is best designed for 510 cartomizers and atomizers. The device is designed for many states that sell cartridges with substandard batteries. Now you can enjoy your oil juice which is very precious like a glass of fine wine.
HOW TO CHECK A VAPE BATTERY
Your vape pen will have a light indicator on the LED to tell you what the battery needs. Low battery signal with red light or bright white light (depending on the model), this means you need to charge it. Once the light on your screen turns green, you know it’s fully charged and ready to use.