12V/24V Car Battery Relay Tester Auto Diagnostic Kit – ANENG RT01 + BT138 Lithium‑Battery Tester

Keep every vehicle on the road running at peak performance with the ANENG RT01 + BT138 Auto Diagnostic Kit. Designed for professional electricians, auto‑repair shops, and DIY enthusiasts, this dual‑voltage testing solution quickly identifies faulty relays, dead cells, and voltage drops in both 12 V and 24 V battery systems.

Key Highlights

• Dual‑Voltage Compatibility: Works flawlessly on 12 V car batteries, 24 V truck/van systems, and lithium‑ion packs.
• Comprehensive Relay Test: RT01 instantly checks starter, fuel‑pump, and auxiliary relays with a simple plug‑in method.
• Accurate Voltage Meter (BT138): Displays real‑time voltage from 0 V to 30 V with 0.01 V resolution.
• Portable & Rugged: Heavy‑duty ABS housing, rubberized grip, and built‑in LED work light for low‑light environments.
• Plug‑and‑Play Design: No batteries or external power required – simply connect to the battery terminals.
• All‑In‑One Kit: Includes RT01 relay tester, BT138 voltage meter, test leads, alligator clips, and a compact carrying case.

Why Choose the ANENG RT01 + BT138 Kit?

When a vehicle won’t start, time is money. This diagnostic kit eliminates guesswork, allowing you to pinpoint a faulty relay or weak battery in seconds. Its high‑precision meter helps prevent costly replacements and ensures that every test is repeatable and reliable.

How It Works

1. Connect the test leads to the battery terminals (positive to red, negative to black).
2. Insert the RT01 probe into the relay socket you want to test.
3. Read the LED indicators – green for good, amber for marginal, red for failure.
4. Use the BT138 meter to verify the exact voltage across the battery or relay coil.

Technical Specifications

• Voltage Range (BT138): 0 V – 30 V
• Resolution: 0.01 V
• Operating Temperature: -20 °C – +60 °C
• Relay Test Voltage: 12 V / 24 V
• Dimensions (RT01): 120 mm × 45 mm × 30 mm
• Weight: 350 g (including accessories)

Ideal For

• Automotive repair shops and service bays
• Fleet maintenance departments
• Electricians and HVAC technicians
• DIY car enthusiasts and hobbyists
• Training programs for automotive diagnostics

Package Contents

• ANENG RT01 12V/24V Car Battery Relay Tester
• BT138 Lithium‑Battery Voltage Meter
• Heavy‑duty test leads (2 m)
• Alligator clips (2 pcs)
• Carrying case with foam inserts
• User manual & quick‑start guide

Upgrade your diagnostic toolbox today with the ANENG RT01 + BT138 Auto Diagnostic Kit – the fastest, most reliable way to test car battery relays and lithium‑ion cells on the go.