100-240V AC Input Voltage. The Watson 2-Bay 9V NiMH Battery Charger allows you to charge up to 2 NiMH 9V batteries at a time. The charger has an external AC adapter for providing power and an automatic shut-off feature to prevent overcharging and short circuiting. There are 4 LED indicators for displaying charging progress and a built-in micro
The NiMH battery charging circuit consists of several components that work together to safely charge the battery. These components include a power source, a charging controller, and a temperature sensor. The power source provides the necessary electrical energy to charge the battery, while the charging controller regulates the charging current
Back EMF only occurs with an inductive or capacitive circuit,you dont have this with resistive circuit. the spark is because at last instant of contact the metal vapourises as previously described.If the voltage is sufficicent over 20 volts, the spark can become an arc,and can reach a length of several inches,the current still flows,until the
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