VoltIQ Power Profiler

USB-PD 3.1 & PPS
Device & Hardware Setup Negotiating
23°C
High ambient heat triggers battery thermal step-down earlier (50-65% SOC).
Negotiated Cap
20.0W
Bottleneck: Adapter
0–50% Time
28 min
Fast-Charge Stage
0–80% Time
54 min
Taper Threshold
Full Charge (100%)
88 min
Trickle / CV Phase
Technical Context: The Gizmodo report notes Apple's 20W charger is on sale for users needing an adapter for newer iPhones. While an iPhone can draw up to 27W–29W peak on a 30W+ charger, the 20W brick achieves 0-50% in ~28 min vs ~23 min on a 30W brick (only ~5 min difference due to thermal throttling).
Real-World Dynamic Charging Curve
Power (W) State of Charge (%)
Playback / State Inspector: Minute 30m SOC: 53%
0m (Plugged) 30m 60m 90m 120m
Instantaneous Power 19.8 W 9.0V / 2.2A PDO
Battery Pack State 53.2 % 2,492 mAh absorbed
Thermal State & Curve Mode 34.8°C • Stage 2 (Taper) Passive heat equilibrium
Adapter Shootout for Selected Device Comparing real elapsed minutes & marginal gains
Adapter Model Rated Power Peak Delivered 0 to 50% 0 to 80% Full (100%) Delta vs 20W
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