Portable juice cups may fail to charge due to the following reasons:
1. The connection between the charger and the juice cup is not smooth, the lid is not closed tightly and other problems affect the contact between the charging interface and the charger;
2. Juice cup battery aging, damage or position off and other hardware problems;
3. The charging cable is not reliably connected or the charger fails. Therefore, when we encounter a juice cup charging problem, we should carefully check the relevant hardware and connection to find the problem and repair or replace the relevant components to ensure the normal use of the portable juice cup.