Anker leads the charging technology space with reliable power banks and chargers that excel in real-world use. Far beyond a simple battery, a quality power bank features sophisticated electronics to maintain charge, deliver power across devices, and endure repeated cycles. We put the Anker PowerCore Speed 20000 QC through rigorous testing to evaluate its capabilities.
Table of Contents
Features | Unpacking | Performance | Can I Take It on a Flight? | Advantages | Disadvantages | Conclusion
Here's a quick specs overview:
The package includes the power bank, a USB cable, and documentation.

A power button on the side checks battery level via four LEDs—each representing 25%. The photo below shows 75% capacity.

Note: A single flashing light indicates 1-25% remaining, so plan accordingly to avoid carrying a dead weight.
It arrived at 50% charge and fully powered my phone twice (30% to 100%) before depleting. Full recharges take about 9 hours, but it recharged my phone six times on a single cycle.
For the OnePlus 5T, it delivered a 30-100% charge in 90 minutes—15-30 minutes faster than a standard charger.
Impressively, it stayed cool even charging my phone and headphones simultaneously, a testament to Anker's thermal management.
At 72.36Wh, it complies with most airlines' 100Wh carry-on limit. Pack it in your hand luggage only—never checked baggage.
The Anker PowerCore Speed 20000 QC is a dependable, high-capacity power bank for quick, reliable charging on the go. Ideal for users needing multi-device support without frequent recharges. Highly recommended based on our extensive testing.
Anker PowerCore Speed 20000 QC