The electric stacker should be removed to keep the small hole open once the electric stacker has been charged for the first time.
All of the batteries should also be unscrewed and closed before usage.
It is definitely forbidden to charge insufficiently while starting off.
If the charging is inadequate, the battery will not be adequately charged for a long period, which will reduce the battery's capacity and limit its life.
The following are videos demonstrating the daily use of this product.