eBay 3A lithium charger module with schematic

I get the feeling this is probably a mass clone of a popular design. It's available from different suppliers with a slightly different appearance.
The design uses a cluster of very common 4056 charge control chips in parallel to give higher charging current.
The keywords for finding this module are TP4056 3A - cost is around 4£$€.

Double check your jack connectors connections before soldering it on, as the PCB is deigned to take various styles, and it's possible to put the pins in the wrong holes. The module does have polarity protection.

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