Description: _x005f_x000D_ 1. When using lithium battery, its charge and discharge need a circuit protection to protect the lithium battery from being charged or damaged or to obtain safe power supply from the lithium battery. _x005f_x000D_ 2. The mobile power module is used as the charge and discharge protection for lithium battery. _x005f_x000D_ 3. Compared with the general lithium battery protection board, the module has four LED indicators to indicate the current power of the lithium battery. _x005f_x000D_ _x005f_x000D_ Specification: _x005f_x000D_ Input voltage: DC 4.65V-5.5V _x005f_x000D_ Overcharge protection voltage: 4.2V ± 1% _x005f_x000D_ Over discharge protection voltage: 3 ± 1% v _x005f_x000D_ Charging current: 0-2.1A _x005f_x000D_ Discharge current: 0-2.4A _x005f_x000D_ Output voltage: 5V _x005f_x000D_ Input protection: over current, over voltage, short circuit protection _x005f_x000D_ Output protection: over voltage, overcharge, over discharge, over current protection _x005f_x000D_ Overcurrent protection value: 3.5A _x005f_x000D_ Over temperature protection: over temperature protection _x005f_x000D_ Operating temperature range: - 20℃ to + 85 ℃ _x005f_x000D_ Boost efficiency: up to 92% _x005f_x000D_ Product size: 25 * 16mm/0.98*0.62'' _x005f_x000D_ _x005f_x000D_ Operation: _x005f_x000D_ 1. Function features: key on / off; support charging and discharging at the same time; 4 LEDs, 4-level power indication; intelligent identification of load, automatic standby, standby current less than 100uA; Self-adaptive charging current regulation, self-adaptive adapter. _x005f_x000D_ 2. Key function: if the duration of the key is longer than 50ms but less than 2S, it is short press action. Short press will turn on the power indicator and boost output. The key action less than 50ms will not have any response. Press the key twice in a row within 1s, and the boost output, power display and lighting LED will be turned off. _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Please allow 1-3mm differs due to manual measurement. _x005f_x000D_ Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding. _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 X 2A 5V Charge Discharge Integrated Module