system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do phone batteries die at low temperatures, even if the charge amount is nowhere near 0%?

I found a previous post on this but the explanations were not really something a five year old would understand.
gpt
The protection circuit in the battery shuts it off. Li-Ion batteries mustn’t be discharged below ~3.0V voltage. Low temperatures make the battery voltage drop. There is a deep discharge protection circuit, usually built directly into the battery pack which shuts it off.