Battery Internal Resistance Meter Kit – Arduino Uno Pulse Tester with OLED Display

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Have a drawer full of batteries and no way to tell which still hold their charge? This kit transforms an Arduino Uno into a professional-grade internal resistance meter using a precise pulse load test. You’ll quickly separate healthy cells from failing ones, making data-driven decisions about your power sources.

What You'll Build

A compact, Arduino-based meter that applies a controlled current pulse and calculates internal resistance from the voltage sag measured by the INA219 sensor. The result appears instantly on the 0.96-inch OLED display, giving you a real-time health check for AA, AAA, Li-ion, or 9V batteries.

What You'll Learn

• Measuring internal resistance using the Delta V / Delta I method
• Controlling a power MOSFET as a high-speed switch for pulse loads
• Wiring and coding I2C sensors (INA219, OLED) with Arduino IDE
• Interpreting battery degradation and the role of internal resistance

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11-12 physics students exploring electrical concepts, ATL Tinkering Lab participants prototyping battery-powered devices, and any young maker who wants to understand why batteries fail. Perfect for Smart India Hackathon teams that need reliable power source evaluation.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.