Product descriptionInput interface: Type-c USB
The board size: about 2.2 * 1.7
CMCharge cut-off voltage: 4.2 V + / - 1%Battery overcharge lifting voltage: 4.00
VBattery discharge termination voltage: 3.2
VBattery: over-current protection current 3
AMaximum charging current output: 1000 maThe battery discharge protection voltage: 3.0
VThe battery overcharge protection voltage: 4.28
VThe input voltage: 4.35 -6V (recommended voltage 5V)
Package Included: 2pcs TP4056 Type-c USB 5V 1A 18650 Lithium Battery Charger Module