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Li-Ion/Li-Po 1S battery charge level indicator with LED display
0
Description
Li-Ion/Li-Po 1S battery charge level indicator with LED display
The Li-Ion/Li-Po 1S battery charge level indicator is designed for precise monitoring of cell state. The module is ideal for electronics projects where voltage must be tracked in the 3.3V - 4.2V range. It is an excellent complement to power supply circuits for Arduino, ESP8266, ESP32, and Raspberry Pi.
Key technical specifications
- Measurement range: 3.3V - 4.2V
- Power supply: drawn directly from the measured source
- LED indicator: 4-step, precisely indicating voltage level
- Refresh rate: 500 ms per measurement
- Operating temperature: from -10°C to 65°C
- Dimensions: 44 x 20 x 9.2 mm
- Block backlight color: blue
- Battery outline backlight color: red
Backlight levels
The indicator has a clear display that changes the number of illuminated blocks depending on the measured voltage:
- Below 3.3V: 0 blocks
- 3.3V - 3.5V: 1 block
- 3.5V - 3.7V: 2 blocks
- 3.7V - 3.9V: 3 blocks
- Above 3.9V: 4 blocks
How it works
The module features a 4-step LED display. When voltage drops below 3.3V, none of the blocks are lit, indicating the cell is discharged. As voltage rises, successive segments light up until all four blocks are lit at voltages above 3.9V. Capacity blocks are lit in blue, while the battery outline is in red, providing very clear and intuitive readings of power status.
Example applications
- Monitoring battery state in mobile robots and remotely controlled vehicles
- Power monitoring in portable IoT projects based on microcontrollers
- Visual charge indicator in power banks and DIY emergency power systems
- Protection against deep discharge in weather stations
- Monitoring 1S cell state in modeling and consumer electronics
Benefits
- Easy installation: compact dimensions allow installation even in very small enclosures
- No additional power supply: the circuit draws power directly from the measured pack, simplifying the wiring
- High readability: contrasting display colors make it easy to quickly assess battery status
- Smooth operation: 500 ms refresh ensures up-to-date and accurate voltage information
- Reliability: a wide allowable operating temperature range enables use in demanding environmental conditions
Shipping costs
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