Battery Capacity & Internal Resistance Tester – 4-Wire Precision Tester for 18650, 26650, 21700, AAA & Button Cells cable tester with LED indicator voltage imbalance range (5–29%)

voltage imbalance range (5–29%)

giving you a complete picture of what you're breathing indoors

both Round and Flat variants share the same universal fit for standard routers

and power electronics students across India who need a reliable

Battery Capacity & Internal Resistance Tester – 4-Wire Precision Tester for 18650, 26650, 21700, AAA & Button Cells cable tester with LED indicator voltage imbalance range (5–29%)High Accuracy 4 Wire Testing: Measures battery internal resistance with superior precision using a true 4 wire Kelvin connection. Wide Battery Compatibility: Ideal for testing 18650, 21700, 26650, AAA, button cells, and other cylindrical batteries. Reliable Performance: Helps identify battery health, performance drop, and quality differences quickly and accurately. Easy to Use: Simple clamp and test operation makes it perfect for technicians,