Multiple lithium batteries can be charged, but the corresponding circuit needs to be used to manage the charging process. For example, if you want to charge two 18650 batteries, you can use two TP4056 chips and connect them in parallel. In this case, two chips will work at the same time, with each chip responsible for charging one battery. Note, however, that this method requires careful design and debugging to ensure a safe and stable charging process. It is recommended to consult the relevant data books and information before use.
tp4056 is a 4.2v single lithium-ion battery charging integrated circuit, can not be charged for multiple lithium batteries.