37V Ultra-Narrow Ultra-Ternary Lithium Battery Charging Board 1A 42V Charger Converter Module Type-C Interface Power Supply _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Features: _x000D_ _x000D_ 1.Ultra-narrow design saves space: only 7mm wide, perfectly utilizing the empty space on the side of the battery to make more space for other circuits _x000D_ _x000D_ 2.Compatible with a variety of lithium batteries: for 3.7V lithium batteries, including 18650, 21700, 32700 and other common models _x000D_ _x000D_ 3.Efficient and stable charging: input voltage of 5-6V, Type-C interface design ensures fast and stable charging experience _x000D_ _x000D_ 4.Intelligent charging indicator: red light indicates charging in progress, green light indicates full, which is convenient for users to know the charging status at any time _x000D_ _x000D_ 5.Ideal DIY option: suitable for DIY enthusiasts to modify powerful electric mosquito swatters and other projects, providing flexible battery management solutions _x000D_ _x000D_ Parameter: Product Name3.7 4.2V ultra-narrow charging module 1A lithium battery charging board: Input voltage: DC 5-6V Interface: Type C interface Applicable batteries: various types of 3.7V lithium batteries, including 18650, 21700, 32700, etc. Charging indicator: red light Full indicator: green light, full voltage 4.2V Note: The charging module will get hot when charging, which is a normal phenomenon (refer to the cell phone charging hot) Description: The product is suitable for everyone DIY in the use of battery charging management, the module volume is ultra-narrow only 7 mm, the module was designed at the beginning of the modification of the powerful electric mosquito beat can be 18650 lithium batteries on the side of the empty space to make use of, to the other circuits to free up more space. _x000D_ 1.2A lithium battery charging board: Input voltage: DC 4-8V Maximum output current: 1.2A Operating temperature: -40C~85C Preset charging termination voltage: 4.2V (accuracy up to 1%) Protection function: Charging with battery anti-reverse connection function, with BAT-VDD anti-backflow function Standby current: 2A Power consumption: 55A (in shutdown mode) 0V battery charging: support Linear charging current: Maximum 1.2A Three-stage charging: trickle/constant current/constant voltage Features: new charging current condition shorting point, default 1.2A max charging current Note: Do not short multiple shorting points at the same time Indicator light: Charging indicator: red light Full indicator: green light Description: This 3.7V lithium battery charging board with ultra-thin design redefines portable, easily embedded in smart wearable micro-drones, IOT devices, electric mosquito swatters, and other compact space to bid farewell to the bloated wiring troubles, equipped with current regulation technology, support five current precision regulation, whether it is a low-capacitance button battery or a high rate of power battery cell, can be matched with the best charging curve, taking into account both the speed and the health of the battery. _x000D_ Package include: Module x1 _x000D_ _x000D_ _x000D_ _x000D_