This module is for charging a single-cell Li-ion battery. The board includes a load-sharing circuit. If the battery is charging, the load draws current from VIN; otherwise, it draws from the battery.
The Boardoza TP4056 Module is a versatile and compact 1-cell lithium-ion/lithium-polymer battery charging and power management module, based on the widely-used TP4056 ...
Draining a battery is easy. Just put a load across the terminals, maybe an incandescent bulb or a beefy power resistor, and wait. What’s quite a bit trickier is doing so safely. Put too large a load ...