Lithium battery Charger

thingiverse

Here's a very simple lithium batteries charger that can be set up right under your desk for easy and efficient use. You only need to purchase the charging electronic cards and connect them to the batteries. I've bought these ones, which are extremely affordable and work flawlessly: https://www.banggood.com/5-Pcs-TP4056-Micro-USB-5V-1A-Lithium-Battery-Charging-Module-Board-TE585-Lipo-Charger-p-1255762.html?rmmds=myorder&cur_warehouse=CN. Just link the "B+" and "B-" ports to the positive and negative terminals of the battery you want to charge, and the "In+" and "In-" ports to a 5v power source. This should help you with your projects.