Common Grenade - Fortnite Update

Update few parts to support switch push button and lipo battery charger. I addition I add place to magnets to better hold the cap, I used 20 X 6 X 2 mm Neodymium. I user 18650 lipo battery with the following charger:
https://www.aliexpress.com/item/3pcs-5V-1A-Power-Bank-Charger-Module-Charging-Circuit-Board-Step-Up-Boost-Power-Module-Lithium/32822945810.html?spm=a2g0s.9042311.0.0.27424c4diI0tcc

I just solder out the USB connector leaving only the charging Micro USB connector.

[Update]

Arduino Code:
https://github.com/asapir/FNGrenade

Schematic attached