BT1688 Digital Battery Tester Accurate measurement: The BT1688 Digital Battery Tester tests C, AA, AAA, D, N, 9V, and 1.55V button cells to determine the battery capacity. Clear LCD display: The LCD provides easytoread results with colorcoded zones—red for poor, yellow for weak, and blue for good—allowing quick assessment of battery health. Durable construction: Built with quality plastic and stainless steel, the BT1688 is designed for longevity and reliable household battery checks. Simple operation: To use, place the battery in the correct position and the tester automatically begins testing, offering effortless operation for users of all experience levels. Function, compatibility, material, and performance: Function—accurate battery capacity readings; Compatibility—supports C, AA, AAA, D, N, 9V, and 1.55V button cells; Material—quality plastic and stainless steel; Performance—automatic testing with clear results. Practical use scenarios: Check batteries in common devices such as remotes, flashlights, and toys. Verify spare batteries in a workshop or garage before use in tools or devices. Audit emergencykit batteries to ensure readiness during outages.