Fast charging
A class of charging technologies that deliver high wattage (45–300 W) to refill a phone battery much faster than the 5–20 W of legacy USB. Requires both compatible charger and device.
Fast charging negotiates a higher voltage/current with the device via USB Power Delivery (PD) or a proprietary handshake (SuperVOOC, HyperCharge, etc.).
Protocols
- USB PD (PD 3.1 / EPR) — open standard, up to 240 W.
- OPPO/OnePlus SuperVOOC — 80–150 W proprietary, requires SuperVOOC charger.
- Xiaomi HyperCharge — 90–120 W proprietary.
Battery longevity tradeoff
Fast charging produces heat. Most modern phones temperature-throttle aggressively: the published 120 W rating typically holds for the first 50% and tapers thereafter. The headline "0–100% in 26 minutes" is real but the last 30% is much slower than the math implies.
Charging to 80% and stopping is the longevity-friendly approach if you care about battery health 3+ years out.
How to use Fast charging in a real comparison
A class of charging technologies that deliver high wattage (45–300 W) to refill a phone battery much faster than the 5–20 W of legacy USB. Requires both compatible charger and device. 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.