To charge the Teal Sport flight battery, first read and remove the warning sticker covering the yellow xt60 connector on the battery. Next, plug the charger into a wall outlet and connect the supplied balance lead cable between the battery’s balance port and the correct connector on the charger. The charger will only work when the cables are plugged into to the right holes.Charging time for a complete charge is 30 minutes. Charge state is determined by flashing LED’s on the charger with 25%, 50%, 75% and 100% positions. When all lights are solid, the battery is fully charged. View the image below.