The adapter secures a 3000 mAh batter on the batter slot in the Tarmo 5 RC.
The adapter is open enough to allow the battery to air cool.
The adapter has a big tab to allow the TPU clip to hold it.
Note: The one in the picture was a tighter fit so I reduce the size of the floor by .8mm. This way the cable don't get pressed. And the tab was hard to get with the fingers so I added a modification so it is easier to grab.
The author remixed this model.