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2. Battery tester - Wikipedia

   en.wikipedia.org/wiki/Battery_tester

   Battery tester. A battery tester is an electronic device intended for testing the state of an electric battery, going from a simple device for testing the charge actually present in the cells and/or its voltage output, to a more comprehensive testing of the battery's condition, namely its capacity for accumulating charge and any possible flaws affecting the battery's performance and security.

3. Multimeter - Wikipedia

   en.wikipedia.org/wiki/Multimeter

   To measure resistance, switches arrange for a small battery within the instrument to pass a current through the device under test and the meter coil. Since the current available depends on the state of charge of the battery which changes over time, a multimeter usually has an adjustment for the ohm scale to zero it.

4. Electrical safety testing - Wikipedia

   en.wikipedia.org/wiki/Electrical_safety_testing

   To do this test, you need to have an insulation resistance tester, which may be a small hand held battery powered device, up to a larger luggage sized tool able to achieve higher test voltages. Variables to choose before starting an electrical resistance test is the test voltage, test duration, and test points.

5. List of electrical and electronic measuring equipment

   en.wikipedia.org/wiki/List_of_electrical_and...

   Measures the frequency of the current Leakage tester: Measures leakage across the plates of a capacitor LCR meter: Measures the inductance, capacitance and resistance of a component Megger tester: Measures Resistance of an Winding of Motor or Generator And Measures Earthing's Resistance Microwave power meter: Measures power at microwave frequencies

6. Electric battery - Wikipedia

   en.wikipedia.org/wiki/Electric_battery

   Capacity is usually stated in ampere-hours (A·h) (mAh for small batteries). The rated capacity of a battery is usually expressed as the product of 20 hours multiplied by the current that a new battery can consistently supply for 20 hours at 20 °C (68 °F), while remaining above a specified terminal voltage per cell.

7. Battery simulator - Wikipedia

   en.wikipedia.org/wiki/Battery_simulator

   If the battery simulator has a current limit feature and if the current exceeds the maximum set value, the simulator automatically increases the voltage to limit the current [3] The advantage of using a battery simulator is its ability to freely set the emulated battery voltage to any value in order to test the charger.