Digital Power Bank Module

Dual USB is 1/2A, and the power is high and heat is low.   Connect the battery positive and negative optimistic about the reconnection, the wrong connection, B + connected to the battery positive, B – connected to the battery negative.   parameter: 1. Input USB model; Micro USB (1A) 2, input voltage; DC5V ± 0.3V 3, charging current; 1000ma (within 1A) 4, charging method; first constant current, after constant pressure 5, output 2 USB female seats (1/2A adaptive) 6, the output voltage is; 5V ± 0.3V 7, output USB rated current is; 2.1A (adaptive) 8, discharge efficiency: >85% 9, size: 73mm * 25.3mm * 12.5mm (thickness including components)   How many batteries are suitable for the battery? whatever capacity is ok, the larger the capacity, the longer the charging time, the other will not have any effect, the recommended capacity is around 10000MAH.