When should you replace the batteries in the infrared tester?

• A. Only During Scheduled Maintenance
• B. As Soon As The Battery Indicator Appears
• C. When Readings Drift
• D. Never Replace Until Failure

Answer: (B)

Battery health directly affects the accuracy of an infrared tester, and the battery indicator is meant to warn you before performance drops. Replacing the batteries at the first sign of the indicator keeps readings reliable and prevents sudden tool failure in the field. Waiting for readings to drift can lead to inaccurate data, and waiting until a complete failure leaves you with an unusable instrument when you need it most. Relying only on scheduled maintenance ignores real-time status, and never replacing until failure is unsafe. So, the best practice is to replace as soon as the battery indicator appears.