Black Anker 10,000mAh power bank with red case

Lost my black Anker 10,000mAh power bank, in a red silicone case yesterday around 3pm near the Ferry Building Marketplace along the Embarcadero in San Francisco. It’s a matte black model with a small white sticker bearing the initials 'JP' on the back and a faint diagonal scratch on the shell. It was in a tiny zippered pouch inside my backpack; this thing powers my daily commute and I’d be really relieved to get it back. It also has sentimental value because it was a gift from my sister.