CN3065 Mini Solar Li-ion Charger Module

The CN3065 Mini Solar Li-ion Charger Module is a small, practical charging board for makers who want to recharge a single 3.7V lithium-ion or lithium-polymer cell from a solar panel or standard Micro USB power source. Built around the CN3065 lithium battery charge management chip, this module is widely used for 18650 charging, solar-powered electronics and portable embedded systems where a simple, low-cost charger is required. The module works as a linear CC/CV charger: it first charges the connected Li-ion/LiPo cell with a controlled constant current and then finishes at a regulated 4.2V constant-voltage stage. The CN3065 is popular in solar applications because it can work with photovoltaic inputs in the typical 4.4V to 6V range, allowing hobbyists to pair it with small 5V or 6V solar panels for outdoor battery charging. A Micro USB input is also provided on common mini boards, so the same charger can be powered from a USB adapter, power bank or lab supply when sunlight is not available. This mini solar charger board is suitable for single-cell 18650 holders, compact LiPo packs and low-power projects that need rechargeable energy storage. Typical applications include solar garden lights, GPS trackers, weather stations, Arduino and ESP32 sensor nodes, emergency lamps, camping devices, portable robotics and educational renewable-energy kits. Status LEDs on the board help indicate charging and charge-complete conditions, making testing and installation easier. Connect the solar panel or USB source to the input side and the battery to the battery output pads/connector, observing correct polarity. The module is intended for charging one protected or properly managed 3.7V lithium cell only; it is not a boost converter and does not provide a regulated 5V output. Package includes one CN3065 Mini Solar Li-ion Charger Module.