There is no way to restore the battery power when the mobile phone battery is placed in the refrigerator, only to extend the standby time of the battery. This is because freezing 15 minutes in the refrigerator will slow down the movement of molecules in the battery.
Nowadays, all mobile phones use lithium batteries, and lithium batteries count the times of full charge. That is to say, no matter how many times it is charged. For example, when you charge 20% for the first time, you pull it out. The second time, put it in 50% and then pull it out. The third time, put it in 30% and then pull it out. These times add up to 100% of the fee, which means full charge. Then your battery is activated. So you just use it and charge it.
Extended data:
Matters needing attention in charging mobile phone battery
1, select original products such as original charger.
2. Don't touch the mobile phone battery with wet hands when charging.
3. Don't deliberately run out of battery power before charging, which is bad for the battery.
4. Don't charge the mobile phone battery too full. Many people like to fully charge their mobile phone batteries and throw them into sockets or patch panels. You don't have to fill it too full. You can refill it later.
References:
Baidu encyclopedia-charging
Baidu encyclopedia-lithium battery