PCB_4P Load and Charger - 18650 (mAh counter)

Using 10w resistors, each of up to 4 18650 cells are discharged to a user set value (must be greater than 2.4V - DW01C-G limitation). It is then charged via the TP4056 chargers while the current is measured - allowing the accumulated charge to be counted and displayed on the 2004 LCD display.

User input is via 4 tactile buttons and will allow adjustment of the various variables.

Ultimately, the idea is to measure the capacity of 4 cells simultainiously. This is a tool to speed up the process of building battery packs with cells of equal capacity.