Skip to content

Monday, 19 October 2026Independent vape reviews, guides & culture

USB-C Charging Explained: What the Numbers on the Charger Mean

Volts, amps and watts — and why the charger in your drawer is probably fine (but check the manual).

Guides Desk1 min read
Share
USB cables in close-up
Illustrative photo: Lucian Alexe / Unsplash

Chargers list numbers like “5V ⎓ 2A”. Here’s what they mean.

Term Meaning
Volts (V) Electrical “pressure”
Amps (A) Current — how much flows
Watts (W) Volts × amps — total power

The practical bit

Devices draw what they’re designed for. Follow your device manufacturer’s charging guidance, use decent cables and see battery safety basics.

The Vaper's Diary newsletter

Get the Diary

New gear, useful guides, questionable opinions and the occasional rabbit hole. One email a month. No spam, no "limited time offers".

Adults only. Unsubscribe whenever you like. Privacy.