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【Effortless Parasitic Draw Testing】Quickly locate hidden battery drains without a multimeter. This vehicle battery leakage detector connects directly to your 12V battery and displays real-time current and voltage, helping you identify faulty circuits that cause overnight power loss.
【Dual Display & Fuse Protection】Monitor both voltage (V) and current (A) simultaneously on a clear digital screen. Built-in 10A fuse safeguards your vehicle's sensitive electronics from accidental overload, making this parasitic draw tester safe for modern cars, trucks, and RVs.
【Simple 4-Step Operation】No mechanical skills required. Turn off the engine, remove the key, connect the clamps, and read the display. A pseudo-lock mode ensures accurate dark current detection while the vehicle enters sleep mode.
【Universal 12V Compatibility】Works perfectly with cars, SUVs, motorcycles, ATVs, boats, and RVs. Whether you're a DIY owner or a professional mechanic, this battery drain tester helps maintain battery health and prevent unexpected starting failures.
【Reliable Maintenance Tool】Real-time leakage detection allows early diagnosis of parasitic draw issues before they leave you stranded. Compact, durable, and repeatable – an essential addition to any garage or roadside emergency kit.

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Instructions:

- Turn off the engine, open the hood, lock all doors, and wait for the vehicle to enter sleep mode.
- Attach the spring clamp to the negative battery terminal. Connect the black clamp to the negative battery post and the red clamp to the positive battery post.
- Loosen the nut on the negative battery terminal clamp, then disconnect the negative clamp from the battery post.
- Read the value on the meter display: 50 mA corresponds to a meter reading of 0.05 A.
- After testing, remove the testing device first, then reconnect the negative battery terminal to avoid sparking during connection.
- The tester is equipped with a small 10A fuse. Replace it with a fuse of the same rating if it is damaged.

Understanding Your Test Results:

Healthy Range (20mA - 50mA): Your vehicle is in a healthy "Sleep Mode."
Abnormal Range (Above 50mA): You have identified a leak! It's time to pull fuses to find the culprit.
The Goal (0.00A - 0.05A): No significant leakage—your battery is safe!

Specifications:

Name: Car Battery Drain Tester
Voltage Range: 12V DC Universal
Current Detection: Up to 10A (Fused for Safety)
Display: Dual Digital LED (Red/Blue or Green)
Connection: Heavy-Duty Insulated Alligator Clamps
Function: Real-time Voltmeter & Ammeter

Package Includes:

1/2 Set Car Battery Leakage Detector
1/2 Pair Gloves

Usage Notes:

- Before testing for electrical leakage, please turn off the engine and remove the key. Do not start the engine during testing to avoid blowing a fuse.
- To test for electrical leakage, simulate the vehicle's non-operating state. Be sure to lock all doors and remove the key to put the vehicle's computer into sleep mode.
- Sleep times vary by vehicle model; please wait patiently for the vehicle to enter sleep mode before taking measurements.
- Standby current differs across vehicle models. The ideal standby current for ordinary vehicles is between 20–50 milliamps.

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