Big yellow USB banana power bank.

This is a bit of an oddity. It's a single 18650 USB power bank that is themed on a banana, and I bought it to see how well they had managed to incorporate the holder for the cell into the curved body. It turns out that the holder is actually big enough to accommodate a protected cell.
But it turned out to be more interesting than that, since it uses a different style of power bank charge/boost chip than normal.
It's also very comfortable to hold in a pistol-grip style if using with a USB flashlight head.