A battery charger is a necessity when taking care of any rechargeable batteries. Whether in need of a smart battery charger, vape battery charger, or a magnetic charger, BatteryJunction has a large selection of charger types. In need of more than one channel? There are battery chargers that come with up to 16 channels. Not to mention, there are battery chargers that will easily charge 18650s, 16340s, and AAs, and more all at once.