If you don't have an external battery charger, get one! It makes so much of a difference in battery life compared to a usb charging removable batteries in the mod. This cost
$9.99 XTAR MC2 VAPE 18650 BATTERY CHARGER
Everything You Need to Know About the 18650 Battery
18650 Batteries: Everything You Need To Know When Vaping - V2 Vaping UK
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UltraFire18650 Battery and Charger Combo Rechargeable Lithium Battery 2600mAh MAX 3.7V (2 Pack)-Suit - Ultrafire.com
Best 18650 Battery Chargers for Vaping (2-Bay & 4-Bay Chargers)
The Best Battery Chargers for Vaping [2022]
Just ordered the Smok Alien 220w and some 18650 batteries, but to charge the batteries do i need a battery charger or can i have them in my vape and plug in