TP4057 1A Li-ion Charger Module Charging Board Protection Type-C 4.2V 4.35V Selectable for 18650 3.7V Li-ion LiPo Parallel DIY

p{margin-block-start: 0; margin-block-end: 0}Ultra-Compact & Safe Charging Solution! TP4057 1A Li-ion Charger Module, Type-C Input, 4.2V/4.35V Selectable with Full Protection for DIY Projects.Key Features & Benefits: All-in-One Protection: Integrated protection against over-charge, over-discharge (2.4V cut-off), and over-current (~4A). No extra BMS needed.⚡ Smart Charging Management: Standard CC/CV algorithm with auto-cutoff (trickle Voltage Selectable: Choose between 4.2V (Standard) or 4.35V (High Voltage) via solder jumper to maximize battery life and capacity. Modern Type-C Port: Reversible USB Type-C port, works with any 5V USB adapter or power bank.✨ Extremely Compact: Designed for space-constrained projects, one of the smallest full-featured solutions available.Product Description:Need a reliable, safe, and tiny charging management board for your single-cell 3.7V Li-ion/LiPo batteries (like 18650)? This TP4057 module is the answer. It combines efficient charging with comprehensive protection, making it easy to integrate into portable speakers, LED projects, emergency packs, and various DIY creations. Critical User Guide: Read Before Soldering to Avoid Damage!❌【What This Is & Its LIMITATION】: This is a PARALLEL-ONLY Charging Module.Parallel Connection ONLY: Batteries MUST be connected in parallel. NEVER connect in series – it will instantly destroy the module!Not a Finished Product: You MUST solder battery wires and input wires. Solder jumpers are used to select the charging voltage.⚠️【Most Common Mistakes & Misuses (90% of Failures)】:1. Wrong Voltage Selection: The module may default to 4.2V. If you use 4.35V high-voltage batteries, you MUST solder the corresponding jumper pad to select 4.35V, or the battery won't charge fully. Using 4.35V for standard cells causes dangerous overcharge!2. Reverse Polarity: Reversing input or battery polarity will immediately and permanently kill the module! Triple-check ‘+’ and ‘-’ markings.3. Using Too Thin Wires: Thin wires cause high voltage drop, preventing proper operation or causing overheating. Use sufficiently thick wires (AWG22 or thicker recommended).4. Testing Without Activation: After connecting the battery, the protection circuit may be in sleep mode. You need to connect a charging power source (5V USB) once to activate it before it outputs.✅【Required Conditions & Correct Steps】:1. Prepare: Soldering iron, solder, wires, multimeter (recommended).2. Select Voltage: First, solder the correct voltage jumper pad (4.2V or 4.35V) according to your battery.3. Solder: Solder battery wires (mind the polarity!) and input wires.4. Activate: For first use, connect the battery first, then connect the charger to activate the protection circuit.5. Test: Use a multimeter to check the battery voltage to confirm proper charging.【Safety Warnings & Compatibility】:Input Voltage: Strictly 5V. Exceeding 6V may damage the module.Operating Temp: Getting warm during charging is normal. Ensure adequate ventilation.Compatible Batteries: Single-cell 3.7V Li-ion/LiPo (e.g., 18650, 14500, pouch cells). NOT compatible with LiFePO4 or other chemistries.Specifications:IC: TP4057Input: USB Type-CInput Voltage: 5V DCCharging Current: 1A (Default)Termination Voltage: 4.2V or 4.35V (Solder Jumper Selectable)Protection: Over-Charge, Over-Discharge (2.4V), Over-Current (~4A)Connection: Parallel ONLYModule Size: Approx. 12mm × 17mm × 4.4mmPackage Includes:1 x TP4057 Lithium Battery Charger Module