1-8S LiPo Digital Battery Voltage Tester with Low Voltage Alarm Buzzer

The 1-8S LiPo Digital Battery Voltage Tester is a mandatory piece of field equipment for anyone working with multi-cell lithium polymer or lithium-ion battery packs. This tiny, lightweight module plugs directly into the standard JST-XH balance lead of your battery and instantly cycles through real-time voltage readings. Its bright, red digital LED screen displays the total pack voltage, followed by the exact voltage of every individual cell in the series. This allows you to immediately identify unbalanced cells or dead packs before they leave your workbench.

Beyond simple diagnostics, this module acts as a critical active safety monitor during operation. It features two incredibly loud piezo buzzers and a programmable voltage threshold (adjustable via a small push-button between the buzzers). If you strap this to your RC drone, RC car, or custom robotics project, the alarm will scream the moment any single cell drops below your set limit (e.g., 3.3V). This provides an unmistakable auditory warning to stop operating immediately, saving your pack from irreversible deep-discharge damage and preventing mid-air power failures.

Key Features & Functional Advantages:

• Instant Cell Diagnostics: Takes the guesswork out of battery management by providing immediate, highly accurate voltage readouts without the need to fumble with multimeter probes.

• Programmable Low-Voltage Alarm: Easily adjust the alarm trigger point from 2.7V up to 3.8V per cell (or turn it completely OFF) to suit your specific chemistry and discharge requirements.

• Twin 95dB Buzzers: The alarm is piercingly loud, ensuring you can hear it clearly over the roar of brushless motors or from across a large flying field.

• Lost Model Finder: Because the alarm triggers when the battery drops, it doubles as an excellent beacon to help you locate a crashed drone or plane in tall grass.

• Broad Compatibility: Works with everything from tiny 1S micro batteries up to massive 8S heavy-lift power systems, supporting LiPo, Li-ion, LiMn, and Li-Fe chemistries.

Perfect For:

• RC Drones & Airplanes: An essential onboard payload for FPV pilots and aircraft enthusiasts flying without advanced telemetry radios to prevent over-discharging mid-flight.

• Surface RC Vehicles: The perfect low-voltage cut-off substitute for older Electronic Speed Controllers (ESCs) that only support NiMH batteries.

• Bench Diagnostics: A fast, reliable tool to check the storage status of your battery collection before heading out to the field or plugging them into a charger.

• Custom Power Walls: A great, inexpensive way to monitor the cell balance on custom 18650 packs used for IoT nodes or DIY solar storage.

Technical Specifications:

• Supported Chemistries: LiPo / Li-ion / LiMn / Li-Fe

• Supported Cell Count: 1S to 8S (Note: Alarm function requires at least 2S to power the buzzers; 1S is for voltage testing only)

• Voltage Detection Precision: ± 0.01V

• Individual Cell Display Range: 0.5V to 4.5V

• Total Voltage Display Range: 0.5V to 36V

• Alarm Set Value Range: OFF, or 2.7V to 3.8V (Adjusted in 0.1V increments)

• Connection Type: JST-XH Balance Pins (2.54mm Pitch)

• Approximate Dimensions: 40 mm x 25 mm x 11 mm

• Approximate Weight: 9 grams

Ensure your order is placed by 2PM to guarantee next-day delivery! Our commitment to prompt service includes a 24-hour delivery system through our network of carriers, aimed at ensuring your package arrives right on schedule.

Please note, a delivery fee of €4.99 applies for orders under €50. For those in remote areas, be aware that our couriers may apply an extra surcharge. This additional fee helps cover the costs of transporting your items to harder-to-reach locations.