What does charger wattage actually mean?
Watts measure how much power a charger can supply, not how much your device will take. Here's how to read the number on the box.
Guides
Charging, explained
Short guides to the specs that actually change a buying decision. No jargon left unexplained.
Basics Standards USB-C Power Delivery (PD) explained
USB PD is the standard most USB-C fast chargers use. Learn how it negotiates power, what PD 3.0 and 3.1 add, and what to check.
Standards What is PPS, and does your phone need it?
PPS lets a phone fine-tune the charging voltage. Some Android phones, including many Samsung models, need it to reach their fastest speeds.
Hardware What is GaN charging?
GaN (gallium nitride) helps chargers be smaller and run cooler. It describes how a charger is built, not how fast it charges.
Multi-device Why multi-port chargers split power
A 100W charger with three ports rarely gives 100W to each. Here's how power sharing works and how to read allocation tables.
How-to How to choose a charger for several devices
A practical checklist for picking one charger for a laptop, phone and accessories, without overpaying or ending up with slow ports.
Accessories Does your USB-C cable matter?
Yes, above 60W. Most USB-C cables carry up to 3A; laptops that charge at 100W or 140W need a cable rated for it.
Safety Charger certifications explained, and why they matter
What UL, ETL, FCC, CE, USB-IF and efficiency marks actually mean on a charger, which ones are about safety, and how to check that a mark is real.