Power Bank Charger Module with LCD & Dual USB interface 5V 1A 2.1A With Automatic Protection

From the shop's description

Description This charging board for a mobile power bank contains converters for two 5V outputs with a maximum current of 2.1 and 1.0 A, a charging circuit from micro USB 5V, a built-in LCD indicator with blue backlight and a display of the percentage of charge and connected outputs, a built-in LED flashlight. Features: The board has protection functions: from overcharging by voltage, from over-discharge by voltage, protection from overload by current. When the maximum charge voltage is reached, the charge is automatically stopped, the stabilization of the output voltage and the limitation of the output current are activated, which makes it safe to charge smartphones, tablets and other mobile devices. Technical characteristics: micro USB input: 5 V 1 A USB output: 5V 2.1A / 5V 1A (Dual USB interface) Display: intelligent digital display with display of charge percentage Supported battery type: Li-ion batteries 3.7 (18650, 1-6 pcs in parallel) Board size: 57 mm x 28 mm Screen size: 28 mm x 14 mm Connection Notes: The circuit board is connected to the battery negative B-, B + is the positive, do not connecting reversed, connecting reversed will burn the board, the battery is connected in parallel welding, assembling battery.