Description
Product Overview
The 1-8S Lipo Battery Voltage Checker (commonly known as the “BB Alert Pro”) is an essential safety tool for anyone using lithium polymer (LiPo) or lithium-ion (Li-ion) batteries. Whether you are flying a drone, racing an RC car, or building a portable power bank with Arduino / Raspberry Pi, monitoring battery voltage is critical to prevent expensive damage .
This compact 2-in-1 device combines a high-precision digital voltmeter with an adjustable low-voltage alarm. Instead of guessing when your battery is running low, simply plug the battery’s balance lead into the board. The device will instantly scan every cell, display the individual voltages on the LED screen, and—if any cell drops below your set threshold—trigger a loud buzzer (the “BB” sound) and flashing red light to alert you immediately .
This device supports 1S to 8S batteries, making it versatile enough for 3.7V single-cell projects up to 33.6V high-power 8S systems. It features reverse connection protection to prevent accidental damage, automatic voltage detection, and an ultra-compact form factor weighing only 9 grams, making it ideal for mounting directly onto a drone frame or keeping in your toolkit .
Key Features
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2-in-1 Functionality: Works as both a precise digital battery voltage tester and an adjustable low-voltage alarm .
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Wide Battery Compatibility: Supports 1S to 8S Lithium batteries (LiPo, Li-ion, LiFePO4) covering a total voltage range of 0.5V to 36V .
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High-Precision Measurement: ±0.01V accuracy, ensuring you get an exact reading of each cell’s health .
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Adjustable Low-Voltage Alarm: Customizable trigger voltage (OFF or 2.7V to 3.8V). Default is 3.3V, perfect for standard LiPo safety .
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Loud Audible & Visual Alert: Features a piercing dual-buzzer system (“BB响”) and a flashing red LED when voltage drops below the threshold .
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Reverse Polarity Protection: Safe connection even if you plug the balance lead in backward, preventing short circuits.
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Plug-and-Play: No buttons required for basic voltage reading; simply plug in to see results instantly.
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Auto Memory Function: The device remembers your last set alarm voltage even after unplugging .
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Ultra-Lightweight: Weighs only 9 grams and measures 40x25mm, small enough to leave connected to a drone during flight .
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Applicable Battery Types | 1S-8S Li-ion / LiPo / LiFe / LiMn |
| Individual Cell Voltage Range | 0.5V – 4.5V |
| Total Voltage Range | 0.5V – 36V (Max detection) |
| Voltage Detection Precision | ±0.01V |
| Low Voltage Alarm Trigger Range | OFF / 2.7V – 3.8V (Settable) |
| Default Factory Alarm Setting | 3.3V |
| Alarm Activation Mode (Buzzer) | 2S – 8S |
| Working Temperature | -10°C to +50°C |
| Dimensions (L×W×H) | 40mm × 25mm × 11mm |
| Weight | Approx. 9g |
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