ANENG BT-171 12V Car Battery Tester with LED Display & Reverse Protection

Know Your Battery's Health Instantly

The ANENG BT-171 is a compact, professional-grade 12V battery tester designed for automotive technicians, electricians, and car owners who need fast, accurate battery diagnostics — day or night.

With its bright LED reverse display screen, you can clearly read battery status even in low-light conditions. No batteries required — it draws power directly from the vehicle's battery for live measurements.

Key Features

• Instant Battery Status — Real-time voltage display with color-coded LED indicators (FULL / MEDIUM / LOW / EMPTY)
• Generator Charging Test — Checks alternator output to ensure your charging system is working correctly
• Reverse Connection Protection — REVERSE indicator lights up and buzzer alarm sounds if clips are connected incorrectly
• LED Backlit Display — Clear readings in dark environments; ideal for garage and roadside use
• No Battery Needed — Powered directly by the vehicle battery being tested
• Compact & Portable — Lightweight design fits easily in any toolbox or glove compartment
• CE Certified — Meets international safety and quality standards

LED Indicator Guide

• 🟢 FULL — Battery fully charged, normal condition
• 🟡 MEDIUM — Slightly low voltage, charge recommended
• 🔴 LOW — Battery low, charge immediately + beep alarm
• ⚫ EMPTY — Battery completely dead, needs charging
• 🔵 GOOD — Alternator output is normal
• ⚠️ HIGH — Alternator output voltage is too high
• 🚨 DEAD — Battery critically low, professional inspection needed
• 🔄 REVERSE — Clips connected incorrectly, buzzer alarm activated

Technical Specifications

• Model: ANENG BT-171
• Test Voltage: 12V DC
• Test Method: Positive/Negative clamp connection
• Material: ABS insulation
• LED Colors: Red / Yellow / Green / Blue / White
• Certification: CE

How to Use

1. Connect the red clip to the battery's positive (+) terminal and the black clip to the negative (−) terminal.
2. The LED display will immediately show the real-time battery voltage and status.
3. To test the alternator, keep the tester connected and start the engine — the display will show the generator's output voltage.

What's in the Box

• ANENG BT-171 Battery Tester × 1
• User Manual × 1