AITIAO 2S 3S 4S Type-C to 8.4V 12.6V 16.8V Step Up Booster Converter Inverter 18650 Lihtium Lipo Polymer Li-ion Battery Charger Board

Specification
1.Operating Ambient Temperature:－40℃ to ＋85℃
2.Size: 39mm x 18mm x 6.3mm
3.Weight: 5g
4.Quantity: 2pcs (3S 4A)

Feature:
Switching Frequency up to 1MHz
Quasi-CV mode to Compensate for the Voltage Loss on Battery Internal Resistance and Trace Resistance
Automatic Recharge
Protection for Battery Voltage Being Low than Input and Short Battery
Good adaptability to Input Supply with Limited Driving Capability
Battery Overvoltage Protection

Led Indicator:
1.''CR'' LED is charge status indicator
2.''OK'' LED is fully charged or Constant voltage mode

Scope of Use:
2-Cell(2S) 8.4V Version
1.Input voltage : DC 3-6V(Recommend DC 3.7V 5V)
2.Input current : 1A(1A Version);2A(2A Version);4A(4A Version
3.Charging voltage : 8.4V
4.Charging current : 0.55A(1A Version);1.1A(2A Version);2.2A(4A Version)

3-Cell(3S) 12.6V Version
1.Input voltage : DC 3-6V(Recommend DC 3.7V 5V)
2.Input current : 1A(1A Version);2A(2A Version);4A(4A Version)
3.Charging voltage : 12.6V
4.Charging current : 0.37A(1A Version);0.74A(2A Version);1.48A(4A Version)

4-Cell(4S) 16.8V Version
1.Input voltage : DC 3-6V(Recommend DC 3.7V 5V)
2.Input current : 1A(1A Version);2A(2A Version);4A(4A Version)
3.Charging voltage : 16.8V
4.Charging current : 0.28A(1A Version);0.56A(2A Version);1.12A(4A Version)

Applications:
PDA,MP3 Players,MP4 Players,Digital Cameras,Bluetooth Applications,Game Players,Notebook,li-on Lithium Battery 18650,Mobile phone,Solar charging,A