It depends on the battery capacity of the mobile phone and the strength of the mobile power supply.
A 5000 mAh mobile power supply can actually charge about 3000 mAh in a mobile phone. It can charge a 3000mAh mobile phone battery once and then run out of power. A 4000mAh mobile power supply can actually charge the entire battery. of the mobile phone. This is around 2,400 mAh. It can only charge a 2400mAh mobile phone battery once. If the battery capacity is more than 2400 mAh, it cannot be charged once. in the cell phone is 1800 mAh. It can charge 1800 mAh. The cell phone battery is fully charged once.
The capacity of lithium batteries will decrease when used at an altitude of 4,000 meters. According to relevant information, the capacity of lithium batteries will decrease at an altitudeof 4,000 meters. The only thing that affects lithium batteries is temperature. Air pressure at high altitudes should have less impact on the batteries. The performance of lithium batteries decreases as the temperature drops, so the capacity of lithium batteries decreases when used at an altitude of 4,000 meters.