This two-in-one DC-DC charge and discharge module offers a max 2A load current and 5V output (Normally open). It features 4 levels of charge/discharge electricity indication and button-controlled output. The module comes with a built-in power management circuit that boosts a lithium battery to 5V and supports charging and discharging simultaneously. Besides, it has battery protection which makes it applicable for batteries without a protective board,

This module can be applied to car charging retrofit, driving recorder power supply, DIY mobile power bank, and mobile phone/laptop portable charging devices.

Note: The KEY function is invalid in charging mode. In discharging mode, short press the button once to enable output, and the indicator turns on; Long press for about 10s to disable the output, and the indicator turns off this time. The indicator goes off after 35s when there is no operation in discharging mode. When charging and discharging at the same time, please enable input and output to keep a balance, thus extending module service life.

Pin Definition

Wiring Instruction

Charge and discharge

Charge only

LED Indication

Features : 

• 4 levels of charge/discharge electricity indication
• Button-controlled output
• Built-in power management circuit

Applications : 

• Car charging retrofit
• Driving recorder power supply
• DIY mobile power bank
• Mobile phone/laptop portable charging device

Specifications : 

• Charge Voltage: DC 4.6V to 5.4V(Typical 5V)
• Input Current: 2A-3A
• Charge Current: 0-2.1A
• Fully-charged Voltage: 4.2V±1%
• Charging quiescent current: 100uA
• Discharge Current: 0-3.5A
• Discharge quiescent current: 50uA
• Output Voltage: 5V(Normally open)
• Output Current: 0-2.1A
• Boost Efficiency: ≤92%
• Charge Efficiency: ≤91%
• Discharge Efficiency: ≤96%
• Ambient Temperature: -20℃ to +85℃
• Pad Pitch: 2.54mm
• Pad Hole Diameter: 1mm
• Dimension: 25*16mm/0.98*0.63”
• Lithium Battery Protection: over-current, over-voltage, over-temperature, short circuit protections

Package Includes : 

• 1 x DC-DC Charge Discharge Integrated Module (5V/2A)