12v - 9v DC converter 20w to USB to power iOS device?

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HQRP® Step-Up Converter; Input: 5V USB; Output: DC 9V or 12V, 1000mA; Connectors: 5.5x2.5mm, 5.5x2.1mm, 4.8x1.7mm, 3.5x1.35mm; 3.0x1.0mm; Polarity

HQRP 5V USB to DC 9V 12V Step-Up Module Converter Cable Works with External Battery Pack Laptop Desktop Tablet Router Speaker CCTV Camera Portable

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Complete Guide to Using the Correct Charger or Power Adapter (and What Happens If You Don't)

Monoprice Ultra‐Compact & Slim Power Bank 10000mAh, with PD 3.0 & QC 3.0 Capacity Enough for 2‐3 Full Charges, Even on the Most Demanding Smart Phones. Fast Charging at up to 22.5W. Fast charge your mobile devices with Monoprice Ultra‐Compact & Slim 10,000mAh Power Bank. It is one of the smallest 10,000mAh power banks in the market (at just 4.2 x 2.7 x 0.6), yet packs enough power to give 2-3 full charges (0 to 100%) for smart phones.