Battery Capacity Indicator & Voltage Tester — DC 8V to 100V

Keep your batteries performing at their best with this smart Battery Capacity Indicator Voltage Tester Gauge. Compatible with a wide range of battery types — including lithium iron phosphate (LiFePO4) and ternary lithium — this compact monitoring device delivers accurate State of Charge (SOC) readings, adjustable voltage alerts, and critically, power-off data memory so your settings are never lost between sessions. Made in Mainland China.

Key Features

Power-Off Memory: Retains all data and calibration settings even after power loss — no need to reconfigure every time you reconnect.
Custom SOC Curves: Import personalized State of Charge curves tailored to your specific battery chemistry for pinpoint-accurate capacity readings.
Voltage Alarm System: Set adjustable overcharge and over-discharge thresholds; the device alerts you before your batteries reach unsafe levels, helping protect your investment.
Wide Voltage Range: Measures DC 8V to 100V, making it highly versatile across different battery bank sizes and configurations.
Broad Battery Compatibility: Works with lithium iron phosphate, ternary lithium, and other common battery types with customizable parameter settings for each.
Multi-Scenario Ready: Ideal for RVs, electric vehicles, solar storage systems, UPS units, computer rooms, and off-grid setups.
Compact ABS Housing: Lightweight and durable at just 73 × 43 × 14 mm — easy to mount in tight spaces.

Specifications

Voltage Range	DC 8V – 100V
Material	ABS Plastic
Dimensions	73 × 43 × 14 mm
Color	Black
Battery Compatibility	LiFePO4, Ternary Lithium & more
Country of Origin	Mainland China

What's in the Box?

1 × Battery Capacity Indicator / Voltage Tester Gauge

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For further reading on safe battery usage and electrical standards, visit the U.S. Consumer Product Safety Commission – Battery Safety.

Note: Actual color may vary slightly from images due to monitor brightness and lighting conditions. Please allow minor measurement tolerances for listed dimensions.

Learn more: Nio Inc.

Frequently Asked Questions

Q: What battery types is this voltage tester compatible with?

A: The battery capacity indicator is compatible with a wide range of battery chemistries, including lithium iron phosphate (LiFePO4) and ternary lithium batteries. Custom SOC curves can be imported to fine-tune readings for your specific battery type, ensuring accurate capacity monitoring.

Q: Will my settings be lost if the power goes out?

A: No. The power-off data memory function ensures that all your configured settings, calibration data, and SOC curves are retained even after a complete power loss. When power is restored, the device picks up right where it left off — no recalibration required.

Q: What is the voltage range this tester supports?

A: This battery capacity indicator supports a DC voltage range of 8V to 100V, making it suitable for a broad range of battery bank configurations used in RVs, electric vehicles, solar systems, UPS units, and more.

Q: How does the voltage alarm system work?

A: You can set custom overcharge and over-discharge voltage thresholds directly on the device. When the battery voltage crosses either threshold, the alarm activates to alert you — helping prevent battery damage and keeping your system operating safely within its intended voltage window.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.