DIY Multimeter: NJTY T92 vs. Aicevoos 58D Comparison

If you're interested in DIY multimeters, this article is worth checking out.

If you've modified your NJTY Nanjing Tianyu T92 to use a lithium battery but forgot to measure the voltage adjustment, causing it to burn out—what should you do?

Although fully automatic multimeters can automatically detect measurements, they tend to be slow in displaying readings. A better alternative would be a multimeter with an automatic range selection and a dial switch, such as the Aicevoos 58D (AS-58D). It looks identical to the NJTY Nanjing Tianyu T92 and offers the same features.

When comparing the size of the NJTY Nanjing Tianyu T92, the original 9V battery version was modified to use a lithium battery with an integrated charge and discharge booster. However, after increasing the voltage, it burned out—yet the damage isn't visible from the outside.

Side-by-side comparison with the NJTY Nanjing Tianyu T92

Comes with a sturdy protective case featuring magnetic absorption.

Front view

Battery compartment: Uses three AAA batteries (3.6V–4.8V), which falls within the lithium battery discharge range. Modifying it to use a lithium battery should be simple—likely just requiring a charge/discharge protection board. If you have time, you can give it another try.

Backlight function included

Internal view after disassembly: Nearly full-featured—it's truly a universal multimeter. The circuit board appears to be the same as the Nanjing Tianyu T21D.