When you go out into the field for a long flight, you take several batteries with you so you are not limited to the short flight time.
With these caps, you can now easily identify which of your batteries are flat (empty), which are storage status and which are fully charged(full).
The red caps are for your flat batteries, The green ones are for your fully charged batteries, The black ones are for your storage batteries.
These caps are not only for identification purposes, however.
They are also extremely useful in protecting your XT30 connectors from dirt, water, and grime in the field.
These great little caps provide additional comfort by further reducing the chance an electrical short circuit whilst in transit or storage.
6 x Red Rubber Caps
6 x Black Rubber Caps