IPhone power bank left in a cold room (minus 1ish)?

Hi, I have an Iphone power-bank which I use to top up the battery of my phone when I'm out.

The other day I left it in a room in my house and went out. When I came home I felt it and it was really cold the touch.

Can these things leak liquid?

I was told leaving it in the cold could make it leak? Its not leaking but I want to be careful

I think its ion lithium?

It'll be fine, just let it warm up. These things are more sturdy than you think.

-1C is not cold enough to damage it, but you will find it sluggish if you try to use it to charge anything - at least until it warms up!

Lithium batteries don't so much leak as vent - sometimes violently. If the battery in the device is deforming put it in a plastic bag and move it out of the house and away from anything flammable until you can dispose of it safely. DO NOT PUT THE BATTERY IN YOUR DOMESTIC GARBAGE!

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