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- Optimized MPPT Charging: Compatible with CN3791 controller to maximize solar panel power and improve charge efficiency for single cell 3.7 V Li Ion. - Ready For Solar Input: Accepts nominal 6 V solar panels via 2 pin Compatible with JST plug for quick plug and play setup. - Safe Charging Profile: Constant current and constant voltage algorithm for reliable single cell Li Ion charging with 4.2 V termination and up to 2 A charge current. - Compact And Clear: Small PCB fits tight enclosures with clearly labeled IN and BAT pads for straightforward wiring. - Versatile Uses: Suited for 18650 packs small LEDs IoT nodes and DIY power banks when paired with an appropriate 3.7 V Li Ion cell.