What happens when you heat up your phone battery with a hair dryer?

Question

Iron

The battery in my phone died six months ago. Now, already in another phone, the battery also died. And six months ago, and now, the phone was completely discharged, and I put it on charge only after a few hours.
Yesterday I warmed up the batteries with a hairdryer and, lo and behold, they worked. A question for knowledgeable physicists: what happened and why did heating with a hair dryer help?

Answer 1

The only thing that comes to mind is that as the temperature rises, the rate of chemical reactions increases, and after warming up, the voltage was enough to start the battery charge controller. But six months in a discharged state for a battery is a lot.

Answer 2

Have you tried something else? Or did you immediately decide to warm it up with a hair dryer? )

Answer 3

apparently, from a complete discharge, millions of ions simply slowed down / stopped, and from heating they began to move again and apply voltage. another example in the subject: the battery in the cold sits down many times faster.

Answer 4

And for laptop batteries, can this help?

Answer 5

I somehow revived Li-Ion (purely for fun) with a series of static discharges ~ 30 kV from an electric fork :) The battery either came to life or finally died - one of the two.

Answer 6

How was it determined that the battery was dead? From a simple discharge to zero, batteries in modern phones should not die.