You can judge whether the capacity of the battery is normal or not by the charging time of the battery.
Drain the battery and check the charging time:
- The charging time of the 10 cells battery is about 1.5 hours;
- The charging time of the 20 cells battery is about 3 hours;
- The charging time of the 30 cells battery is about 4.5 hours;
- The charging time of the 40 cells battery is about 6 hours;
- The charging time of the 50 cells battery is about 7.5 hours;
- The charging time of the 60 cells battery is about 9 hours.
* If the charging time is far away from above, then there is something wrong with the battery.