How to calculate charging time?
For example, if you want to charge a 4S 2200mah battery, and the charger is 80W, then the maximum power of charging is 80W/16.8V=4.7A, and the charging time is 2.2/4.7=0.7 hour. Adding the constant voltage and trickle time, the total charging time is about 1 hour( The constant voltage and trickle time is changed according to battery capacity. The larger the battery capacity, the longer the time).
Please turn off and pull the plug of the charger immediately when the battery is full charged to avoid safety incident.