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๐ Never get caught powerless again โ master your batteries like a pro!
The Dlyfull-B4 Battery Tester is a compact, versatile device designed for professionals and tech-savvy users to quickly and accurately assess the health of 12 different battery types, including Ni-MH, Li-ion, Alkaline, and LiFePO4. Featuring a smart LCD display with dual-format battery level indicators and precision voltage readings, it supports a wide range of cylindrical and button cells. Lightweight and portable, it includes a self-check function to monitor its own battery status, making it an essential tool for efficient battery management and avoiding unexpected power failures.
| ASIN | B0D393WVPK |
| Best Sellers Rank | #154,974 in Electronics ( See Top 100 in Electronics ) #197 in Household Battery Testers |
| Brand | DLYFULL |
| Brand Name | DLYFULL |
| Color | Black |
| Colour | Black |
| Customer Reviews | 4.2 out of 5 stars 461 Reviews |
| Included Components | NO |
| Item Dimensions | 15.5 x 9.1 x 2.3 centimeters |
| Item Weight | 0.3 Pounds |
| Item dimensions L x W x H | 15.5 x 9.1 x 2.3 centimeters |
| Item weight | 0.3 Pounds |
| Manufacturer | Dlyfull |
| Number of Items | 1 |
| Part Number | B4 |
| Power Source | NO |
| Power source | NO |
| Specification Met | CE, FCC, RoHS |
| Style | Black |
| Style Name | Black |
| UPC | 825665404983 |
E**E
% life left checker
This works great for all of my various batteries to see how much life is left in them. I'm thinking of getting one to use for my church. I do wish that the polarity of the test points was reversed. It swould make checking the batteries easier.
G**.
Great battery tester for the money!!
This DLYFULL B4 battery tester is a must-have if you check a lot of rechargeable batteries or any other type of batteries. I also went over the tester and used white-out with a brush, and then wiped excess off using WD-40, sprayed on a napkin, and it took the residue off (because it was hard to see the # displayed on the unit), leaving it with white numbers that you can see clearly. This is the best battery tester that I have used so far. I found this tester easy to use, too. If you're looking for a good battery tester, look no further. I found this tester to be very accurate and worth the price.
J**K
Easy to read digital screen, unusual testing method.
Unusual battery tester. Place the positive end on the proper pin on the unit, then take the coiled lead and touch the negative end of the battery. Two handed job. Display will wake up, quickly test battery and give you a numerical percentage read out and a bar graph read out. It has been pretty accurate so far. The battery types are molded into the tester next to each pin, but could use some white filler material to make them stand out and easier to read. Unit uses an internal battery, 2 AAA. It can self-test it and remind you when to replace it. Four stars rating: hard to read markings for the battery types on the unit case, and the display shuts off just moments after you remove the battery you are checking.
J**E
Best battery tester
Easy to use and read results. Definitely value for the cost. So glad I found this on Amazon.
K**R
Bad Device
I purchased this Dlyfull Battery Tester in Oct. 2025. I may have used it once or twice a month. By July 2026 it stopped working. I replaced the batteries, thinking they ran out of juice, but it still would not work. The device kept giving a "malfunction" reading.
Trustpilot
5 days ago
4 days ago