Wattage = Volts × Amps. Higher watts = faster charging, only if your phone supports that speed.
General guidelines (for typical 4,000–5,000mAh phones):
-
5W–10W: 3–4 hours for full charge (old standard, slow).
-
18W–25W: Good for budget phones (0–50% in ~45 minutes, full in ~1.5–2 hours).
-
30W–45W: Sweet spot for mid-range (0–100% in ~1 hour).
-
65W–120W: Ultra-fast (0–100% in 15–30 minutes) – useful for power users.
-
150W+: Overkill for most; may reduce long-term battery health and requires special cables.
Must-have features to look for:
-
USB-C PD (Power Delivery – universal standard for iPhones, Pixels, Samsungs, most newer Androids)
-
PPS (Programmable Power Supply – required for Samsung Super Fast Charging and many modern fast-charge systems)
-
GaN (Gallium Nitride – smaller, cooler, more efficient charger; worth the small extra cost)