Specification: _x005f_x000D_ Certification: NONE _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Accessory Type: Battery Accessories _x005f_x000D_ Model Number: Lithium Battery Charger Module _x005f_x000D_ Tye(optional): 1PCS, 5PCS, 10PCS _x005f_x000D_ Input voltage: DC4.5V-5.5V; IN+ IN- pad wiring or Micro USB 5V input _x005f_x000D_ Full charge voltage: DC4.2V _x005f_x000D_ Charging current: 1A adjustable with charging indicator _x005f_x000D_ Operating temperature: -10°C~+85°C _x005f_x000D_ Product size: 23 x 16 x 5mm/0.9 x 0.6 x 0.2inch _x005f_x000D_ Instructions for use: _x005f_x000D_ 1. after powering up, the blue indicator of the module is always on and the red indicator flashes slightly; _x005f_x000D_ 2. when the battery is fully charged, the module's red and blue indicators are always on. _x005f_x000D_ Tips: _x005f_x000D_ 1. the wiring must be distinguished between positive and negative polarity, reverse connection burn IC _x005f_x000D_ 2. use short and thick wires for charging, if they are too thin and too long, the connection resistance will be high and the battery voltage will drop more after charging _x005f_x000D_ 3. the connection wire should have good contact, otherwise the battery voltage will drop more after charging _x005f_x000D_ 4. the output current can be adjusted by changing the fixed resistor in the circuit board to change the output current from 100mA to 1000mA _x005f_x000D_ 5. if the 5V input voltage is high, such as 5.2V or 5.5V, it will cause the charging current to be less than 1000mA, which is normal. This is normal. The high voltage makes the chip hot and will automatically reduce the charging current to reduce the chance of the chip being burned. _x005f_x000D_ 6. the charging current is too high, or in a high temperature environment, need to do heat dissipation treatment _x005f_x000D_ 7. the ammeter for testing the current can only be connected in series to the 5V input of the charging board _x005f_x000D_ 8. the satisfactory effect of the charging current should be 0.37 times the capacity of the battery. For example, a 1000mAH battery charging current of 400mA is fine _x005f_x000D_ 9. the faster the charging speed, the worse the charging effect, the more the battery voltage drops after charging is completed _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1/5/10pcs x Lithium Battery Charger Module 1. Wide Range of Input Voltage: Our lithium battery charger module is compatible with a wide range of input voltages, ranging from DC4.5V to 5.5V, making it adaptable to a variety of different power sources. 2. Multiple Input Options: With both IN+ IN- soldering terminals and Mini USB 5V input options available, this battery charging board provides flexibility and convenience in powering and charging your batteries. 3. Adjustable Charging Current: The battery charging module features an adjustable charging current of up to 1A, allowing you to customize the charging speed based on your needs. 4. Fully Charged Indicator: Equipped with a charging indicator light, this mini battery charger board keeps you informed about the status of your battery charge, providing peace of mind and convenience. 5. Safe and Reliable: The portable battery charger panel is designed with safety and reliability in mind, featuring over-voltage and over-current protection to ensure safe and efficient charging every time.