Gameboy torch/IR light

Wanted to build a unique remote to work the shutter on my Gameboy Camera. One of the cool things about this is that it can also be used as an LED torch/flashlight just by switching out the LED types!
 

BOM:

• 1 or 2 LED's (depending on which model)
• Appropriate resistor for LEDs. Can be calculated online here.
• 100 mAh LiPo battery. Amazon link
• USB-C charging board. Amazon link
• On-Off switch. I use these
• 6x6x5 tactile momentary switch. Amazon link

There are a few ways to wire this. I choose to build mine where the battery runs to the center pole of my 2-way switch and either powers the LED or completes the charging circuit. This way I can isolate the battery when I'm not using it and don't have to worry about the charging circuit draining my charge. But I also need to switch it into “charging mode" when I charge the battery. 
 

You can also wire the circuit like the example in the photos. This creates an on/off switch so you can simply disconnect the battery while It's not in use.