Battery Charger

Description

3S 12.6V 2A 18650 Lithium Battery Charger Module USB‑CThis compact charging board is designed to charge a 3S (three-cell) 18650 lithium-ion battery pack in series. The module uses USB Type‑C for easy power connection and features a step-up boost converter to reach the required 12.6V charging level, making it an excellent choice for DIY power banks, portable power supplies, and custom battery setups.Technical Specifications:Cell Configuration: 3 × 18650 lithium-ion cells in series (3S)Input Voltage: 5V via USB Type‑C (operates from 3–6 V)Maximum Input Current: 2A (for 2A version)Charging Current: ~0.74A in 2A version (other variants include 0.37A for 1A, 1.48A for 4A)Final Charging Voltage: 12.6V total (4.2V per cell × 3 cells)Charging Method: Constant Current / Constant Voltage (CC/CV) with integrated boost converterProtection Features & Indicators:Overcharge protectionOvercurrent and short-circuit protectionThermal protection includedDual LED indicators: one for charging status (“CR”), another for full-charge indication (“OK”)Physical & Environmental Details:Dimensions: Approx. 39 × 18 × 6.3 mmWeight: Around 5 gOperating Temperature: –40 °C to +85 °CUsage Notes:Use a standard 5 V USB‑C power source (not USB PD, which may require voltage negotiation). Works with “dumb” 5 V supplies.Ideal for projects requiring ~12 V from a stack of 3×18650 cells.Ensure cells are properly balanced before series connection to maintain safety and charging accuracy.Spec Summary:Cell Configuration