You'll see specs like 5V/1A or 5V/2A. The first number is voltage, the second is current. Together, they determine how fast the battery charges. A 1A charger is slower but gentler on the battery; a 2A charger fills it up quicker but can generate more heat. Most vape batteries are designed for 1A, so don't assume 'faster is better.'

Here's the catch: if you plug your vape into a high-wattage wall adapter (like the one for your laptop), you might overstress the battery. That can lead to reduced lifespan or even safety issues. The golden rule: use the charger that came in the box, or one with matching specs. When in doubt, slow and steady wins.