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Dlyfull Universal Battery Tester with LCD Display, Multi Purpose Small Battery Checker for AA AAA C D 9V CR2032 CR123A CR2 CRV3 2CR5 CRP2 1.5V/3V Button Cell Batteries

TLDR Review: Dlyfull Universal Battery Tester

Item: Dlyfull Universal Battery Tester
Author: ShopSavvy

By ShopSavvy Team

Published: February 17th, 2026

Pros

•Tests a wide variety of batteries including AA, AAA, C, D, 9V, and numerous button cells like CR2032 and CR123A, making it truly versatile.
•Easy to use for people of all ages, even those with smaller hands or seniors.
•Small, lightweight, and comfortable to hold without fumbling.
•Provides quick, reliable, and consistent results, especially effective for button batteries that many testers overlook.
•Clear digital bar chart LCD display accurately shows battery condition, helping users decide between reusing or recycling.
•Durable construction offers good value for the price.
•Comes with a AAA battery included, so it’s ready to use out of the box.
•Compatible with key fob batteries and other specialty battery types, ensuring broad usability.
•Helps avoid the frustration of keeping dead or weak batteries around.

Cons

•Text and symbols on the tester are very small and can be hard to read, which detracts from useriendliness.
•Important polarity markings like "+" and "–" are molded into the plastic and not visually distinct.
•While the display is clear, improving the readability of labels and markings would make it near perfect.
•Requires a AAA battery to operate, which is an extra item to keep track of.

Bottom Line

If you want a *compact, versatile, and reliable* battery tester that covers almost every common household battery type—including those tricky button cells—this Dlyfull Universal Battery Tester is a strong choice. It gives clear and consistent readings that save you from tossing good batteries. Just be ready to squint a bit at the small text and molded polarity signs. If readability is a deal-breaker, you might want to check for testers with larger, bolder markings, but overall this device offers great value and performance for the price.