{"product_id":"tp4056-4-2v-li-ion-battery-charger-module-18650-1a-usb-overcharge-protection","title":"TP4056 4.2V Li-ion Battery Charger Module — 18650, 1A, USB-C\/Micro USB, Overcharge Protection","description":"\u003ch2\u003eTP4056 4.2V Li-ion Battery Charger Module — 18650, 1A, USB Input\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eTP4056 charger module\u003c\/strong\u003e 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.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCharger IC:\u003c\/strong\u003e TP4056 (or TEC4056 equivalent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput:\u003c\/strong\u003e USB Micro-B or USB-C (5V)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCharge Voltage:\u003c\/strong\u003e 4.2V ±1% (Li-ion standard)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCharge Current:\u003c\/strong\u003e 1A (default, set by PROG resistor)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCharging Profile:\u003c\/strong\u003e CC\/CV (constant current then constant voltage)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTermination:\u003c\/strong\u003e Current drops to ~50mA at full charge\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndicators:\u003c\/strong\u003e Red LED = charging | Blue\/Green LED = full\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Overcharge protection (4.2V cutoff)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -40°C to +80°C\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTP4056 vs TP4056 with DW01 Protection\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTP4056 only (this module):\u003c\/strong\u003e Charging only — no overdischarge or short circuit protection on output\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTP4056 + DW01 + FS8205:\u003c\/strong\u003e Full BMS — adds overdischarge and short circuit protection on B+\/B- output\u003c\/li\u003e\n  \u003cli\u003eFor unprotected 18650 cells, use the TP4056+DW01 version for complete protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY 18650 Li-ion battery charger\u003c\/li\u003e\n  \u003cli\u003eArduino\/ESP32 project Li-ion battery charging\u003c\/li\u003e\n  \u003cli\u003ePower bank cell charging circuit\u003c\/li\u003e\n  \u003cli\u003eSolar-charged Li-ion battery system\u003c\/li\u003e\n  \u003cli\u003eWearable device battery charging\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eTP4056 Li-ion charger module — 4.2V, 1A, USB input, CC\/CV charging, overcharge protection for 18650 and DIY Li-ion battery charging projects.\u003c\/p\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991449293035,"sku":"\u003cnone\u003e","price":8.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/tec4056-4-2v-lithium-battery-charger-module-18650-non-protection-board.webp?v=1761802364","url":"https:\/\/keszoox.com\/products\/tp4056-4-2v-li-ion-battery-charger-module-18650-1a-usb-overcharge-protection","provider":"Keszoox","version":"1.0","type":"link"}