Battery Status Indicator Caps
Vision Aerial UAVs version 2.3 and higher come with Battery Status Indicator Caps. These are located on the inside of the case. They are used to help remember which batteries have been used.
Colors are as follows:
Red = Any Amount Depleted
Green = Fully Charged
Blue = Storage Charge
These caps are placed on the battery XT90 connector to indicate the charge level of the battery.