Fast charging (watts)
The peak wattage a device accepts while charging. Higher numbers mean faster top-ups, but real-world charge time depends on the curve, not just the peak.
Charging wattage is marketed as a single peak number — "120 W" or "67 W" — but that wattage is only sustained for a small window of the charge curve.
How the curve works
- 0–30%. Peak wattage. The cell tolerates high current at low state of charge.
- 30–80%. Tapers to manage heat and cell stress.
- 80–100%. Trickles slowly; the last 20% often takes as long as the first 80%.
Real-world times
- 120 W phone: 0→100% in ~20 minutes.
- 67 W phone: ~40 minutes.
- 27 W (iPhone): ~90 minutes.
Heat and longevity
Higher peak wattage means higher cell temperatures, which accelerate battery wear. Some manufacturers (OPPO, Xiaomi) use dual-cell architectures to split current and reduce per-cell stress; others (Apple, Samsung) cap wattage to favor cell longevity.
What's needed
- A compatible charger and cable supporting the device's protocol (USB-PD PPS, SuperVOOC, etc.).
- A USB-C cable rated for the wattage (5A cables for 100+ W).
How to use Fast charging (watts) in a real comparison
The peak wattage a device accepts while charging. Higher numbers mean faster top-ups, but real-world charge time depends on the curve, not just the peak. In practice, this is most useful as one part of a decision rather than a standalone quality badge. Compare it alongside the workload, room, ecosystem, budget, and ownership constraints that apply to you; the strongest published figure is not automatically the best outcome for every buyer.
What to check next
On vsMars, read together so the value has product-specific context. It is especially relevant in .
Avoid the one-number trap
Manufacturers can describe the same capability under different conditions. Compare like-for-like variants, check the unit and test condition where available, and use a head-to-head page to see whether a measurable difference is material for your own use.
vsMars presents structured catalog values to make trade-offs legible. The linked product and spec pages are the right place to inspect the underlying values before buying.