DUAL USB 18650 Battery Charger
POWER BANK CHARGER
with an integrated boost converter, lithium battery charge management and battery power indication,
providing a complete mobile power solution
Input parameter: 5 V / 1A
Input interface: V8 micro USB interface
Output parameter: double USB output: 5 V / 2 a
Conversion rate: average of 90%
Built-in lithium battery protection IC, overcurrent, overvoltage, undervoltage protection
Dual USB output
Output Voltage: 5V DC at 2A maximum current, shared across both USB connectors
Charging Input: Micro USB female connector (5V DC)
Charge cut-off voltage: 4.3V (charges a 1S Lithium Ion Polymer Battery)
Maximum charging current: 1000mA
Battery discharge protection voltage: 2.8V
4 LED lights show battery level and charging status: 0-25%: One LED is on , 25%-50%: The first LED is on continuously, the second LED flashes
50%-75%: The first two LEDs are on continuously, the third LED flashes
75%-100%: The first three LEDs are on continuously, the fourth LED flashes. When all 4 LEDs are on continuously, the battery is charged to 100%
Board size: 69mm * 32mm * 8mm (69mm * 37mm including USB connector and LED overhang)
Connect the battery negative terminal to B-, and the positive terminal to B+.
Use caution not to reverse the connection, as it may result in damage to the module.
Up to six battery cells can be connected in parallel. Do not connect them in series.
When a load is connected to either USB output connector, the module will turn on and provide 5V DC output to both connectors at up to 2A total.
To manually turn on the module, press the switch on the back side of the board. When the load is disconnected or turned off, the module will automatically turn off after about 15 seconds.
To turn on the white LED, double press the switch on the back of the board; double press it again to turn it off.
To charge the battery, connect a 5V USB power supply to the MicroUSB input connector. The blue LEDs on the back of the board will provide that charging status.
NOTE: When the battery is charging, the USB output voltage is disabled (turned off).