TP4056 Li-Ion/Li-Po 1A charger, MicroUSB connector, 18650, with protection

TP4056 1A Li-Ion and Li-Po cell charger

TP4056 1A Li-Ion cell charger is a versatile module designed for charging lithium-ion and lithium-polymer batteries with a nominal voltage of 3.7 V. The circuit can be powered via the built-in Micro-USB connector or directly through the solder pads (+) and (-). The module includes integrated protection against over-discharge and overload, making it an ideal solution for charging 18650 cells that lack their own protection circuitry.

Key technical specifications

• Power connector: Micro-USB
• Input voltage: 4.5 - 5.5 V
• Battery charging voltage: 4.2 V
• Maximum charging current: 1 A
• Status indication: built-in LEDs indicating charging in progress and completion
• Module dimensions: 28 x 17 x 4 mm

Example applications

• Building portable power sources and chargers
• Charging single 18650 cells in electronic projects
• Powering circuits that require 3.7 V batteries
• Repairing devices with a damaged factory charging circuit
• Creating emergency power systems

Benefits

• High safety: built-in protections safeguard cells from damage due to overload or deep discharge
• Powering flexibility: you can connect a standard Micro-USB cable or solder your own wires
• Easy installation: compact dimensions of 28 x 17 x 4 mm allow installation in very small enclosures
• Fast operation: maximum charging current of 1 A enables efficient replenishment of battery energy
• Simple operation: integrated LEDs provide clear indication of the current charging stage