It is best not to exceed 8.4V and the charging current is less than 0.8A
The charging cut-off voltage of a single lithium battery is generally 4 .2 V to 4.25 V
The charging cut-off voltage is 6 cells, or 6x4.2 = 25.2 V
The 10.8 V of your computer portable is a string of 4 cells and the charging cut-off voltage is 16.8V< /p>
16v/4a matches perfectly.
According to your question, the balls used in the gun are water-absorbing expansion balls. Normally, they are removed after completely absorbing the water. This means that the water content is very low and there is no problem loading them into the charger. The manufacturer of the water gun carries out appropriate waterproofing during the production process. Regarding battery charging time, the capacity of the battery used by manufacturer varies. Normal charging takes approx.iron 2 hours, subject to the charging indicator. Don't charge all the time. Also, do not charge the battery until it is completely empty, as this will affect its lifespan.