Fast Wireless
Wireless Power · 6 specs
Direct Answer
Proprietary Fast Wireless Charging refers to high-power, customized inductive charging ecosystems developed by smartphone manufacturers (including Oppo/OnePlus AirVOOC, Xiaomi HyperCharge, and Honor SuperCharge). Operating at power tiers from 50W to 100W, they utilize high-voltage resonant pump circuits, active thermoelectric cooling, and dual-cell battery architectures to bypass standard 15W Qi limitations.
Source: Oppo AirVOOC / Xiaomi Wireless Charging Specifications / China MIIT Radio Regulations · Last reviewed Aug 28, 2026
Specs
| Peak Power Delivery Tiers | 50W, 80W, 100W (subject to regional RF regulatory caps) |
| Regulatory RF Power Limit | Historically capped near 50W under China's MIIT radio regulations, reportedly relaxed to around 80W in a 2024 revision -- regional regulatory limits are a moving target and worth confirming against the current rule text |
| Operating Resonant Frequencies | 110 kHz to 148.5 kHz / specialized high-frequency bands |
| Cooling Architecture | Active brushless cooling fan + internal Peltier thermoelectric elements |
| Battery Cell Design | Dual-cell series (2S) battery topology (e.g. 2x 2,500 mAh cells charging at 10V/20V) |
| Fallback Protocol | Falls back to standard WPC Qi (5W–15W) when charging third-party devices |
High-Voltage Charge Pump and Dual-Cell Architectures
Standard Qi charging delivers power at 5V/9V, creating massive resistive I²R heat at high wattages. Proprietary systems (such as 50W AirVOOC or 80W Xiaomi HyperCharge) transmit at 20V with high-frequency resonant switching. The smartphone utilizes dual charge-pump divider circuits to step down the high voltage directly to the dual-cell battery with over 97% electrical efficiency, charging a 5,000 mAh battery to 100% in under 35 minutes wirelessly.
Active Cooling and Regulatory Constraints
Because delivering 50W–100W wirelessly generates significant thermal dissipation, high-speed charging stands incorporate active centrifugal fans and copper heat pipes blowing air directly onto the phone's back glass. China's Ministry of Industry and Information Technology (MIIT) regulates the RF power these chargers can radiate on the 100-148.5 kHz bands to limit aviation and broadcast interference; that cap has reportedly been relaxed over time (commonly cited as roughly 50W historically, loosened to around 80W in a 2024 revision), though manufacturers and regions vary and the current rule text should be checked for any specific product claim.