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QC2.0 9v 2:55h 33Wh 8900 mAh (~1:00h - 50%, ~1:30h - 80%)

Assuming real battery capacity is about 8000 mAh

Power bank charging thermal photo

Price: 14$ (Amazon) + ~8$ delievery to Ukraine by npshopping

Charging phones

3250 mAh Umidigi Z2 Pro (MTK-PE)

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2658 mAh Apple iPhone Xs

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So this power bank is able to charge about two phones with total battery capacity about 6000 mAh