ANENG BT173 Universal Digital Battery Tester | 18650/AA/AAA/9V/12V Button Battery Level Display Tool

The ANENG BT173 is a battery-free universal digital battery tester that works with 18650, AA, AAA, 9V, 12V, and button batteries. It shows the remaining power level on a clear LCD display using both a battery bar and a numerical value. This compact tool helps you quickly check if your household batteries are still usable or need replacing.

This tester does not require its own power source. It uses the battery being tested to power the display, so you never have to worry about replacing internal batteries. Simply slide the battery into the correct slot and read the results in seconds.

The device features reverse polarity protection, which means it will not be damaged if you accidentally insert a battery the wrong way. Its durable ABS insulating material body is built to withstand drops from up to 1 meter, making it a reliable tool for home, workshop, or office use.

With a lightweight design weighing only 33 grams and a slim card shape measuring 10.5 x 7.7 x 1.42 cm, this tester easily fits in a pocket or drawer. It is a practical solution for anyone who wants to avoid guessing whether a battery is still good.

Key Features and Benefits

- Battery-free operation that uses the tested battery as its power source, so you never need to replace internal batteries

• Dual display showing both a battery bar graph and a numerical voltage value for clear and accurate readings

• Wide voltage detection range covering 1.5V-4.8V and 9V-12V batteries, compatible with most household battery types

• Reverse polarity protection that prevents damage if the battery is inserted incorrectly, giving beginners confidence

• Lightweight and portable card design at only 33 grams, easy to carry in a pocket or store in a drawer

• Durable ABS insulating material that can withstand drops from 1 meter, built for everyday use

Who Is This For

- Homeowners who want to quickly test remote control, toy, and smoke detector batteries before throwing them away

• DIY enthusiasts and hobbyists who use rechargeable lithium batteries like 18650 and 21700 cells

• Office workers who need to check batteries for keyboards, mice, and presentation clickers

• Anyone managing multiple battery-powered devices who wants to avoid unexpected power failures

Usage Scenario

Mark reached for his TV remote only to find it was not working. Instead of guessing which batteries to replace, he grabbed his ANENG BT173 tester. He slid the AAA batteries into the tester one at a time. The LCD display showed one battery was nearly dead while the other was still strong. He replaced only the weak battery and his remote worked again. This saved him from throwing away a perfectly good battery and helped him avoid future guesswork.

Micro Comparison

Many battery testers require their own internal batteries or have limited compatibility. The ANENG BT173 works without any internal power source and supports a wide range of battery types from small button cells to larger 12V batteries. Its dual display and reverse polarity protection make it easier to use than basic testers that only show a simple LED indicator.

Specifications

- Model: ANENG BT173

• Material: ABS Insulating Material

• Color: Black

• Display: Battery Bar and Value Dual Display

• Voltage Range: 1.5V-4.8V / 9V-12V

• Power Source: No power supply required (uses tested battery)

• Size: 10.5 x 7.7 x 1.42 cm

• Weight: 33 g

Package Includes

- 1 x Universal Battery Tester

• 1 x Packing Box

Why You Will Love It

No more guessing whether batteries are dead or just low. The ANENG BT173 gives you a clear answer in seconds without needing its own batteries. It is a small investment that helps you get the most out of every battery you own, reducing waste and saving money over time.

Questions and Answers

Question: Does this tester need batteries to work?

Answer: No, the ANENG BT173 uses the battery being tested to power the display. It does not require its own power source.

Question: What types of batteries can this tester check?

Answer: It can test AAA, AA, C, D, 9V, 12V, button batteries like CR2016 and CR2032, and lithium batteries including 18650, 14500, 16340, 21700, and 26650.

Question: How do I read the results on the display?

Answer: The LCD shows both a battery bar graph and a numerical voltage value. The bar gives a quick visual idea of the charge level, while the number shows the exact voltage.

Question: What happens if I insert a battery backwards?

Answer: The tester has reverse polarity protection, so it will not be damaged if you insert a battery the wrong way. Simply correct the orientation and test again.

Question: Is this tester suitable for beginners?

Answer: Yes, it is designed for easy use. Just slide the battery into the correct slot and read the display. No technical knowledge is needed.