1. Input: the charging port supplies power to this power supply
through USB data cable. The built-in battery is 3 pieces,
550mA / piece, 3.7V battery, and the output current is fixed to 1a;
2. Output: supply power to external equipment through
RCA interface or DC interface,
voltage gear: (1-8 gear corresponds to 5-12v)
press + or - key to switch voltage gear, 5V is the lowest voltage,
1 gear corresponds to 5V, 2 gear corresponds to 6V, and so on,
8 gear corresponds to 12V;
3. Power storage: use the matching USB data cable for
fast charging. Normally, it can be charged in 1.5-2 hours,
full in 4 grids, and working at 8V can be used in 5-6 hours