Charge current for those modules is set to 1Amp with an onboard resistor (see the TP4056 datasheet). Silly if you ask me, because of the 0.5A limitation of most basic PC/laptop USB sockets.
They should therefore only be used with a cellphone/tablet charger that can provide at least 1A.
So you should use a 5volt supply with a minimum current capability of 4Amp for four modules at the same time.
Leo..