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TP4056 4.2V Li-ion Battery Charger Module — 18650, 1A, USB-C/Micro USB, Overcharge Protection

TP4056 4.2V Li-ion Battery Charger Module 18650, 1A, USB-C/Micro USB, Overcharge Protection

$8.00 USD

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TP4056 4.2V Li-ion Battery Charger Module — 18650, 1A, USB Input

The TP4056 charger module is the most popular single-cell Li-ion battery charger for DIY projects — providing a complete constant-current/constant-voltage (CC/CV) charging solution for 3.7V Li-ion and LiPo cells (18650, 21700, pouch cells) from a USB power source. The TP4056 IC implements the standard Li-ion charging profile: charges at 1A constant current until cell reaches 4.2V, then switches to constant voltage until current drops to ~50mA (full charge). LED indicators show charging (red) and full (blue/green) status.

Specifications

Charger IC: TP4056 (or TEC4056 equivalent)
Input: USB Micro-B or USB-C (5V)
Charge Voltage: 4.2V ±1% (Li-ion standard)
Charge Current: 1A (default, set by PROG resistor)
Charging Profile: CC/CV (constant current then constant voltage)
Termination: Current drops to ~50mA at full charge
Indicators: Red LED = charging | Blue/Green LED = full
Protection: Overcharge protection (4.2V cutoff)
Operating Temperature: -40°C to +80°C

TP4056 vs TP4056 with DW01 Protection

TP4056 only (this module): Charging only — no overdischarge or short circuit protection on output
TP4056 + DW01 + FS8205: Full BMS — adds overdischarge and short circuit protection on B+/B- output
For unprotected 18650 cells, use the TP4056+DW01 version for complete protection