ANENG BT138 Universal Battery Cell Tester with LCD Display

Never wonder if a battery is dead or just low again. The ANENG BT138 Battery Tester gives you an instant, accurate readout of charge level across a wide range of battery types — all in a slim, pocket-sized device you can take anywhere. Built from durable ABS and silicone, it's designed to last and easy to grip, even during frequent use.

Whether you're testing household batteries, lithium cells for flashlights, or specialty button cells, the BT138 has you covered. Its bright LED/LCD display shows charge status at a glance, so you can quickly sort your good batteries from your spent ones and never waste a battery swap again.

Compatible Battery Types

Standard household: D, C, AA, AAA, 9V
Button/coin cells
Lithium cells: 21700, 18650, 16340
And more rechargeable & disposable types

Key Features

✅ Multi-Type Compatibility — Tests a wide variety of common and specialty battery sizes in one device
✅ Instant LED/LCD Readout — Clear display shows charge level immediately, no guesswork
✅ Compact & Portable — Slim 15cm × 2cm × 1cm profile slips easily into a drawer, toolbox, or bag
✅ Durable ABS/Silicone Construction — Solid build quality for everyday use
✅ No Batteries Required to Operate — Uses the charge from the cell being tested
✅ Ideal for Home, Workshop & On-the-Go — Keep one in the junk drawer, toolkit, or travel bag

Specifications

Model	ANENG BT138
Materials	ABS / Silicone
Dimensions	15cm × 2cm × 1cm
Display	LED / LCD indicator
Supported Types	D, C, AA, AAA, 9V, Button Cell, 21700, 18650, 16340 Lithium & more

Usage Tip

For accurate readings, always ensure the battery is making firm contact with both the positive (+) and negative (−) terminals of the tester before reading the display.

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Frequently Asked Questions

Q: What battery types can the ANENG BT138 battery tester check?

A: The ANENG BT138 is compatible with a wide range of battery types including D, C, AA, AAA, and 9V batteries, as well as button/coin cells and lithium cells such as 21700, 18650, and 16340 — making it a truly versatile tester for home and workshop use.

Q: Does the ANENG BT138 battery tester need its own power source to operate?

A: No — the BT138 draws power directly from the battery being tested, so no additional batteries or charging are required to operate the device. Simply insert the cell and read the display instantly.

Q: How portable is the ANENG BT138 battery tester?

A: Very portable! At just 15cm × 2cm × 1cm and made from lightweight ABS and silicone, the BT138 is slim enough to fit in a drawer, toolbox, backpack, or travel bag — so it's always ready when you need it.

Q: How do I get an accurate reading from the BT138 battery tester?

A: For the most accurate result, make sure the battery is seated firmly and making solid contact with both the positive (+) and negative (−) terminals of the tester before reading the LED/LCD display.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.