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The ECM INDUSTRIES LLC GBT-3502 is an analog household battery tester designed to quickly check the charge state of the most common battery sizes used in residential and light commercial settings. The unit features a movable contact arm that physically adjusts to fit different battery form factors, eliminating the need for multiple adapters. An analog needle display provides a straightforward Low or Good reading, giving technicians and service pros a fast go/no-go assessment without complicated menus or digital calibration. This tester is a practical bench or field tool for anyone who regularly services battery-powered equipment.
The GBT-3502 is suited for use by electricians, HVAC technicians, plumbers, and pool service professionals who encounter battery-powered controls, thermostats, remote sensors, and test equipment in the field. It is equally useful in a shop or service vehicle as a quick diagnostic tool before replacing batteries in controls and low-voltage devices. Sold in a package quantity of five units, making it practical for stocking a service department or distributing across a crew.
Designed to test standard household battery types including AA, AAA, C, D, 9V, and 1.5V button cell batteries commonly found in thermostats, remotes, sensors, and portable test instruments.
No installation is required for this handheld tester. Insert the battery to be tested into the contact arm, ensuring firm contact before reading the analog display. No tools or wiring are involved. Keep the tester away from moisture and extreme temperatures when storing in a service vehicle.
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