The controller boards and chassis kits deserve their own pages:

1. Power sensor breakout

Power sensor breakout board (GitHub)

power sensor breakout render

2. Li-ion chargers

2.1. TP4056 only

Ordered 15 units

https://www.amazon.com/gp/product/B08MT6567Z

tp4056 charger microusb

2.2. TP4056 plus boost converter

Ordered 12 units

https://www.amazon.com/gp/product/B09XM4G3JL

tp4056 charger boost microusb