BlitzWolf BW-P3 9000mAh QC3.0 Dual-USB Portable Battery - $21.99USD ($30.15AUD) Usually $42.89USD @ BangGood

Not the cheapest it's been. Not sure on the expiry date.

Note
This is QC3.0 discharge only

Qualcomm Quick Charge 3.0 Tech:
Quick Charge 3.0 is a power charging technology dramatically shortens charging times than as it adopts the Qualcomm QC 3.0 standard.
This enables the power adapter to provide the following range of voltages: 3.6-12V, to charge at speeds of 4 times faster than conventional charging technology, to charge at speeds of up to 27% faster than QC2.0 Tech.

Qualcomm Certified (QC3.0): NT6008 Fast Charge Chip:
BlitzWolf BW-P3 uses the NT6008 fast charging chip not only supports QC3.0 fast charge tech but also backwards compatible with all
versions of Qualcomm Quick Charge technology (1.0, 2.0 & 3.0). Also compatible with USB Type-C and can provide standard charging
for non-Quick Charge devices.
QC 3.0 Charger's Voltage Output will run at 3.6V-12V. Automatic voltage adjustment, provide better control of power consumption and heat.

Ultimate Material,Quality Assurance:
BlitzWolf BW-P3 Panasonic Li-ion Battery * 3. It not only provides protections from overcharge, overvoltage, overcurrent, and short circuit, but also enhances the charge-discharge efficiency.

Specification:
Brand BlitzWolf®
Model BW-P3
Capacity 9000mAh/33.33Wh
Power 18W(two USB ports total)
Battery Type Panasonic Li-ion Battery * 3
Input 5V/2A (max)
Output 1 5V/2.4A (max)
Output 2 5V/2.4A (non-qc,universal)
3.6-6.5V/3A,6.5-9V/2A,9-12V/1.5A (QC3.0)
Charging time 5 hours (with 5V/2A Charger)
10 hours (with 5V/1A Charger)
Size 10261.521.3mm
Weight 225g±5g
Certification CE,FCC,Qualcomm QC3.0

Package Include:
1 * BlitzWolf® BW-P3 9000mAh QC3.0 Power Bank
1 * Micro USB Charging Cable
1 * User Manual
1 * Warranty Card

An 18-Month Warranty:
We believe in our products, join BlitzWolf to get what you want. We back them all with an 18 months warranty and provide friendly and convenient
support.