The Dayton Audio LLB-LED kit is great for those projects that use the Dayton Audio LBB-3 battery holder board. It enables you to check charging and battery status when the battery holder board is inside a project.
Dayton Audio LBB-LED Red/Green LED with Switch Package for LBB-3 18650 Battery Board
This LED push button kit enables you to check charging status and battery strength when the LBB-3 battery board is not visible inside a project. The push button and LEDs conveniently plug into the battery board without soldering or any other tools. The "Charging" and "Done" LED come with a 20" leads with a 2-conductor plug. The battery status LED and push button come with 10" leads joined together with a 6-condutor plug.