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This KINGTOYO professional tool, Model KT-1957 (KTVBA-1957), is a compact and easy-to-use 12 Volts D.C. Voltage Checker designed for quick and reliable testing of a car's battery and alternator system.
Easy Operation: Designed to "Easily operate & check with the LED LIGHTS" for a quick diagnosis.
Dual Functionality: Checks both the Battery Charge Situation and the Output of the Alternator.
LED Indicator System: Features a series of color-coded LED lights to clearly display the testing status.
12 VDC Only: Specifically designed for 12 VDC vehicle electrical systems.
Portable Design: Comes in a small, hand-held form factor with attached alligator clips (for connection to the battery) and a probe (for potential further checks).
The checker uses a numbered and labeled LED system to indicate the status:
| LED No. | Status Indicator | Voltage Reading | Diagnostic Result |
| 6 | Alternator Check (Engine Running) - Strong | 14.8V Output | Alternator Charging Strong |
| 5 | Alternator Check (Engine Running) - Normal | 13.8V Output | Alternator Charging Normal |
| 4 | Alternator Check (Engine Running) - Low | 13.0V Output | Alternator Charging Low |
| 3 | Battery Check (Engine Stopped) - Charged | 12.8V Good | Battery Good (Fully Charged) |
| 2 | Battery Check (Engine Stopped) - Fair | 12.6V Fair | Battery Fair (Needs Charging) |
| 1 | Battery Check (Engine Stopped) - Poor | 9.8V Poor | Battery Poor (Low Voltage/Potential Failure) |
Note: The LEDs 4, 5, and 6 are used to check the alternator's charging voltage when the engine is running. LEDs 1, 2, and 3 are used to check the battery's static voltage when the engine is stopped.
Model: KT-1957 (KTVBA-1957)
Product: KINGTOYO VOLTAGE BATTERY ALTERNATOR CHECKER
Item Code: KT-1957
Voltage Compatibility: 12 Volts D.C.
Origin: Made in Taiwan (King Toyo Professional Tools)

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