How to Choose the Right Wattage for Your Device
Not all devices need the same wattage — and buying the wrong charger wastes money or delivers slow charging. Here's a practical guide to matching charger…
One of the biggest mistakes buyers make is assuming "higher wattage is always better." In reality, choosing the right wattage depends on what you're charging, how many devices you charge simultaneously, and the charging protocols your devices support.
Wattage by Device Category
Smartphones typically charge at 20-30W. Modern iPhones support 20-27W via PD, while flagship Android phones (Samsung, Xiaomi) can accept 25-45W. A 20W charger covers most phones adequately; 30W gives you headroom for faster-charging Androids.
Tablets need 30-45W. iPads charge at 30W, iPad Pros can accept up to 45W. A 30-45W charger is the sweet spot.
Laptops require 45-100W+. Ultrabooks charge at 45-65W, while gaming laptops and desktop replacements need 100W or more. PD 3.1 extends this to 140W for the latest models.
Multi-device users should consider 65-100W multi-port chargers. A 100W GaN charger with 2 USB-C + 2 USB-A ports can charge a laptop at 65W while simultaneously powering a phone at 20W and a tablet at 15W.
The Danger of Under-Specifying
Using a charger with insufficient wattage won't damage your device — the device simply negotiates the maximum available power and charges slower. But "slow charging" on a laptop might mean it charges at 15W instead of 65W, which is 4x slower. For business users who need their laptop charged quickly between meetings, this is unacceptable.
The Myth of Over-Charging
A 100W charger connected to a 20W phone will not deliver 100W to the phone. The PD protocol negotiates the correct voltage and current — the phone asks for 9V/2.22A (≈20W) and the charger delivers exactly that. The extra capability is simply unused. So buying a higher-wattage charger for flexibility is perfectly safe.
Our Wattage Range
Yuehang offers 45 listed charger and adapter models across several wattage and port configurations. Compliance and OEM options vary by model, so contact Edric (+86 17324295020) with your device, market, and port requirements for a model-matching review.